Publishers 
Knopf



The Audubon Society Field Guide to North American Birds. Eastern Region. Western Region
Knopf, 1977
english text


The Audubon Society Field Guide to North American Wildflowers. Eastern Region. Western Region
Knopf, 1979
english text








The American Museum of Natural History. Guide To Shells. Land, Freshwater, and Marine, From Nova Scotia To Florida
Emerson William E. - Jacobson Morris K. - Knopf, 1976
english text







The Audubon Society Field Guide to North American Wildflowers. Eastern Region
Knopf, 1979
english text




The Audubon Society Field Guide To North American Seashells
Rehder Harald A. - Knopf, 1981
english text

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