Peterson, Lee Allen, author
A field guide to edible wild plants of eastern and Central North America
Houghton Miffiln, 1977
 Buku Teks
Angier, Bradford, author
Field guide to edible wild plants
Stackpole Books, 1992
 Buku Teks
Peterson, Roger Tory, author
A field guide to the birds : a completely new guide to all the birds of eastern and central North America
Houghton Miffiln, 1980
 Buku Referensi
Clark, William S., author
A field guide to hawks North America
Houghton-Miffiln, 1987
 Buku Teks
Robins, C. Richard, author
A field guide to Atlantic Coast fishes: North America
Houghton-Miffiln, 1986
 Buku Teks
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