H - Ciências Sociais 115 E - História dos Estados Unidos da América 61 Q - Ciência 52 B - Filosofia, Psicologia e Religião 27 P - Língua e Literatura 24 S - Agricultura 23 T - Tecnologia 22 N - Belas Artes 13 F - História Geral Americana 12 K - Lei 12 J - Ciências Políticas 8 G - Geografia, Antropologia e Recreação 7 R - Medicina 4 Z - Biblioteconomia 4 L - Educação 3 M - Música 3 C - História 2 D - História do Mundo 2 U - Ciência Militar 2 V - Ciência Naval 2 Ver todos ...

National Audubon Society 14 Adam Matthew Digital (Firm) 11 U.S. Fish and Wildlife Service 10 Canadian Wildlife Service 9 Official Airline Guides, inc 9 American Bar Association Section of International Law and Practice 7 American Birding Association 7 Organisation for Economic Co-operation and Development 7 Queen Mary and Westfield College (University of London) Centre for Commercial Law Studies 7 Southern Methodist University 7 Arnold Arboretum 6 Association of Muslim Social Scientists 6 Eastern Bird Banding Association (U.S.) 6 Inland Bird Banding Association (U.S.) 6 North American Economics and Finance Association 6 Pioneer America Society 6 Western Bird Banding Association (U.S.) 6 American Society of Farm Managers and Rural Appraisers 5 Economist Intelligence Unit (Great Britain) 5 U.S. Fish and Wildlife Service North American Waterfowl and Wetlands Office 5 ATLATL (Organization) 4 American Society of Agronomy 4 Crop Science Society of America 4 Forest History Society 4 Gotham Book Mart Collection (University of Pennsylvania) 4 History of Science Collection (Brown University) 4 International Institute of Islamic Thought 4 New England Botanical Club 4 Soil Science Society of America 4 U.S. Fish and Wildlife Service Division of Bird Habitat Conservation 4 Ver todos ...

English 496 Spanish 26 French 19 Russian 6 German 4 Arabic 3 Italian 2 Multiple 2 Portuguese 2 Swedish 2 Vietnamese 2 Chinese 1 Icelandic 1 Japanese 1 Ver todos ...

1600-1775 10 Colonial period, ca. 1600-1775 10 1945- 3 20th century 3 1945-1989 2 1971- 2 19th century 2 ca 1600-1775 (Période coloniale) 2 1799-1837 1 1882-1927 1 1918-1945 1 1947- 1 1949- 1 1975-1985 1 1981- 1 1981-1989 1 1981-1993 1 1981-2001 1 1982- 1 1982-1994 1 1991- 1 1994- 1 2000 - 2099 1 2000-2099 1 2001-2009 1 2013-9999 1 21st century 1 Since 1945 1 Since 1981 1 ca 1600-1775 (Période coloniale) 1 Ver todos ...