TY  - BOOK
AU  - Bull, John.
AU  - Farrand, John, Jr.
TI  - The Audubon Society Field Guide to North American Birds: : eastern region
U1  - 598.2 
PY  - 1990/// [c.1977]
CY  - New York
PB  - Knopf
KW  - Aves
KW  - E.U.A
KW  - Hábitos y conducta
N1  - 59-70
ER  -