North American and International Bird Atlas Resources
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2nd Pennsylvania Breeding Bird Atlas |
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2nd Indiana Breeding Bird Atlas |
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Ohio Winter Bird Atlas: 2002-2007 |
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Michigan Breeding Bird Atlas II |
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2nd Ontario Breeding Bird Atlas |
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North American Breeding Bird Atlas Explorer hosted by USGS Patuxent Wildlife Research Center |
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North American Ornithological Atlas Committee |
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Cornell Lab of Ornithology Information Science |
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British Trust for Ornithology Atlasing Pages |