TY  - BOOK
AU  - Boyd,I.L.
ED  - Zoological Society of London.
TI  - Marine mammals: advances in behavioural and population biology : the proceedings of a symposium held at the Zoological Society of London on 9th and 10th April 1992 
SN  - 0198540698 :
PY  - 1993///
CY  - Oxford, New York
PB  - Published for the Zoological Society of London by Clarendon Press, Oxford University Press
ER  -