TY  - BOOK
AU  - Pettingill,Olin Sewall
AU  - Breckenridge, Walter J.
TI  - Ornithology in laboratory and field
SN  - 0808716093
AV  - QL673 .P47 1970
U1  - 598.2 
PY  - 1970///
CY  - New Delhi
PB  - Surjeet
KW  - Ornithology
KW  - Zoology
N1  - First-3d ed. published under title: A laboratory and field manual of ornithology; Bibliography: p. 455-503
ER  -