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Author/Creator
- National Audubon Society10
- Sibley, David, 1961-9
- National Geographic Society (U.S.)6
- Bruun, Bertel5
- Robbins, Chandler S.5
- Zim, Herbert S. (Herbert Spencer), 1909-19945
- Dunne, Pete, 1951-4
- Farrand, John4
- Kaufman, Kenn4
- National Wildlife Federation4
- Boyer, Trevor2
- Bull, John L.2
- Burton, Robert, 1941-2
- Clark, William S., 1937-2
- Dobkin, David S.2
- Ehrlich, Paul R.2
- Gooders, John2
- Harrison, Colin James Oliver2
- Kress, Stephen W.2
- Peterson, Roger Tory, 1908-19962