TY  - BOOK
AU  - Sommer,Volker
AU  - Vasey,Paul L.
TI  - Homosexual behaviour in animals: an evolutionary perspective 
SN  - 9780521182300 (pbk.)
PY  - 2006///
CY  - New York
PB  - Cambridge University Press
KW  - Homosexuality in animals
KW  - Sexual behavior in animals
N1  - Includes bibliographical references and index
ER  -