TY  - BOOK
AU  - Stacey, P.B.
AU  - Koenig, Walter D.
TI  - Cooperative breeding in birds
SN  - 0-521-37890-7
U1  - 598.25 
PY  - 1990///
CY  - New York
PB  - Cambridge University Press
KW  - Animals
ER  -