TY  - BOOK
AU  - PETERSON ROGER TORY
TI  - A field guide to the birds: giving field marks of all species found East of the Rockies
U1  - 598.29(70) 
PY  - 1961///
CY  - BOSTON
PB  - HOUGHTON MIFFLIN CO.
KW  - A field guide to the birds: giving field marks of all species found East of the Rockies
ER  -