TY  - BOOK
AU  - Thompson,T.E.
AU  - Brown,Gregory H.
ED  - Linnean Society of London.
TI  - British opisthobranch molluscs: mollusca, gastropoda : keys and notes for the identification of the species 
SN  - 0126893500
PY  - 1976///
CY  - London, New York
PB  - Published for the Linnean Society of London by Academic Press
ER  -