TY  - BOOK
AU  - Tinbergen  Niko
TI  - The Herring Gull's World : A Study of the Social Behaviour of Birds
U1  - 598.2 
PY  - 1960///
CY  - NEW YORK
PB  - BASIC BOOKS INC.
KW  - The Herring Gull's World : A Study of the Social Behaviour of Birds
ER  -