TY  - BOOK
AU  - Ryland,John Stanley
AU  - Tyler,Paul A.
ED  - European marine biology symposium, 23. 
TI  - Reproduction, genetics and distributions of marine organisms
SN  - 8785215155
PY  - 1989///
CY  - Fredensborg
PB  -  Olsen & Olsen, 
ER  -