Angier, Bradford
Field guide to edible wild plants
Stackpole Books, 1992
Buku Teks
Peterson, Roger Tory
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.
A field guide to hawks North America
Houghton-Miffiln, 1987
Buku Teks
Robins, C. Richard
A field guide to Atlantic Coast fishes: North America
Houghton-Miffiln, 1986
Buku Teks
Borror, Donald J.
A field guide to the insects of America north of Mexico
Houghton Mifflin, 1976
Buku Referensi