TY  - BOOK
AU  - MACKENZIE, John P.S
TI  - Birds in peril ; a guide to the endangered bird of the United States and Canada
U1  - 639.978 2 M17B 
PY  - 1977///
PB  - Boston
KW  - BIRDS, PROTECTION OF -- U.S
KW  - BIRDS, PRODUCTION OF -- CANADA
ER  -