TY  - BOOK
AU  - Peterson,Roger Tory
TI  - A field guide to western birds
T2  - The Peterson Field Guide Series
U1  - 598.2978 23
PY  - 1961///
CY  - Cambridge, MA, U.S.A.
PB  - Houghton Mifflin Company Boston
KW  - Birds
KW  - Aves
ER  -