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- Conservation Foundation3
- Milton, John P.3
- Vale, Thomas R., 1943-3
- Conzen, Michael P.2
- Darling, F. Fraser (Frank Fraser), 1903-2
- Defenders of Wildlife2
- Delach, Aimee2
- Fascione, Nina2
- Isenberg, Andrew C. (Andrew Christian)2
- Nicholls, Steve2
- Smith, Martin E. (Martin Edgar), 1955-2
- Wilson, Alexander2
- Wilson, Alexander, 1953-2
- Backhouse, Frances1
- Bertness, Mark D., 1949-1
- Commission for Environmental Cooperation (Montréal, Québec)1
- Darling, F. Fraser (Frank Fraser), 1903-19791
- Doolittle, William Emery1
- EBSCOhost1
- Flores, Dan L. (Dan Louie), 1948-1