A field guide to the birds east of the rockies /
Peterson, Roger Tory, 1908-
A field guide to the birds east of the rockies / Roger Tory Peterson - Boston : Houghton Mifflin Co., 1980 - 384 p. : ill. ; map. 19 cm. - Series ; v.1 .
Sponsored by the National Audubon Society and National Wildlife Federation
Includes index
0395266211
80-014304
Birds--North America.
A field guide to the birds east of the rockies / Roger Tory Peterson - Boston : Houghton Mifflin Co., 1980 - 384 p. : ill. ; map. 19 cm. - Series ; v.1 .
Sponsored by the National Audubon Society and National Wildlife Federation
Includes index
0395266211
80-014304
Birds--North America.