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
Burt, William Henry
A field guide to the mammals : field marks of all North American species found north of Mexico
Houghton Miffiln, 1976
Buku Referensi
Peterson, Lee Allen
A field guide to edible wild plants of eastern and Central North America
Houghton Miffiln, 1977
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