TY  - BOOK
AU  - Hyman, Henrietta Libbie.
TI  -  The invertebrates vol.vi,Mollusca I: aplacophora, polyplacophora , monoplacophora, gastropoda the coelomate bilateria 
U1  - 592 
PY  - 1967///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Invertebrates
N1  - Includes bibliographical references
ER  -