TY  - BOOK
AU  - Marshall, A. J. ...[et.al.]
TI  - Textbook of zoology: Invertebrates; Vol. 1 
U1  - 590 7th.
PY  - 1972///
CY  -  London
PB  - Macmillan
KW  - Invertebrates
KW  - zoology
N1  - Includes bibliographical references and index
ER  -