TY  - SER
AU  - Christal, J., Whitehead, H.
TI  - Aggregations of mature male sperm whales on the Galápagos Islands breeding ground
U1  - 599547599547 
PY  - 1997///
KW  - WH
KW  - Aggregations of mature male sperm whales on the Galápagos Islands breeding ground
ER  -