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 | Nanny Angel Network (GTA), North York Office, Child Care and Support | Toronto |
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 | Nar-Anon Family Groups, Halton Meetings | Halton Region |
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 | Narcotics Anonymous | Halton Region |
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 | Nasagiweya Historical Society | Milton |
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 | Naseeha Muslim Youth Helpline | Mississauga |
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 | Nassagaweya Presbyterian Church | Milton |
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 | Nassagaweya Tennis Club | Milton |
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 | National Canadian Lawyers' Initiative | Toronto |
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 | National Cycling Institute Milton | Milton |
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 | National Eating Disorder Information Centre | Toronto Downtown Central |
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 | National Initiative for the Care of the Elderly, Toronto HomeShare Program, Talk2Nice | Toronto |
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 | National ME / FM Action Network | Ottawa |
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 | National NewsMedia Council | Toronto |
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 | National Pardon Centre | Toronto |
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| National Pensioners Federation | Mississauga |
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 | National Service Dogs | Cambridge |
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 | National Student Loans Service Centre | Mississauga |
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 | National Trust for Canada | Ottawa |
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 | Native Canadian Centre of Toronto | Toronto |
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 | Native Child and Family Services of Toronto, Women's Transition House | Toronto |
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 | Native Horizons Treatment Centre | New Credit |
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 | Native Women's Association of Canada | Ottawa |
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 | Native Women's Resource Centre of Toronto, Community Programs | Toronto |
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 | Nelson Youth Centres | Burlington |
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 | Neurofibromatosis Ontario | London |
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 | New Horizons Media Inc., New Canadians | Pickering |
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 | New Life Deaf Church, Milton | Milton |
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 | New Life Pentecostal Church | Milton |
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 | New Street Christian Reformed Church | Burlington |
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 | NewLife Fertility Centre, Burlington, Reproductive Care | Burlington |
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 | Newlife Fertility Centre, Milton, Reproductive Care | Milton |
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 | Niagara Escarpment Commission | Georgetown |
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 | Ninth Life Cat Rescue of Ontario | Oakville |
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 | Nisa Helpline, Muslim Women's Helpline | |
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 | Nisa Homes, Administrative Office, Nisa Homes, Mississauga | Mississauga |
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 | No One Goes Hungry in Halton | Halton Region |
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 | Normandy Medical Clinic | Halton Hills |
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 | North Burlington Baptist Church | Burlington |
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 | North Burlington Medical Centre, Walk-in Medical Clinic | Burlington |
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 | North Burlington Tennis Club | Burlington |
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 | North BurLINKton Community Group | Burlington |
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 | North Central Community Association | Burlington |
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 | North Halton Girls Hockey Association | Georgetown |
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 | North Halton Kitten Rescue | Georgetown |
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 | North Halton Rugby Football Club | Georgetown |
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 | North Oakville Ward 7 Residents' Association | Oakville |
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 | Northridge Long Term Care Centre | Oakville |
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 | Norval Community Association | Halton Hills |
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 | Norval Heritage Society | Halton Hills |
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 | Norval Presbyterian Church | Halton Hills |
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 | Norval United Church | Halton Hills |
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 | Nottinghill Co-operative Preschool, Licensed Child Care Centre | Oakville |
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 | NPower Canada | Toronto |
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 | Nucleus Independent Living | Oakville |
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 | Nurse Next Door Home Care Services, Oakville and Burlington, Private Home Care Services | Oakville |
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 | Nurse Next Door Home Care Services, Milton, Private Home Care Services | Milton |
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 | Nutrition Screening, Ontario - No Physical Address | Toronto |