TY  - BOOK
AU  - Christensen, J Muller
TI  - Seashells: Bivalves of the British and northern European seas  
SN  -  0140630120
U1  - 594.110447 
PY  - 1978///
CY  - New York
PB  - Penguin Books
N1  - Revised and adapted by S Peter Dance
ER  -