TY  - BOOK
AU  - Patterson,I.J.
TI  - The shelduck: a study in behavioural ecology 
SN  - 0521246466
PY  - 1982///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Shelduck
KW  - Behavior
KW  - Birds
N1  - Bibliography: p256-267. - Includes index
ER  -