TY  - BOOK
AU  - Calow, Peter 
TI  - Invertebrate biology: a functional approachl 
SN  - 0470272384
U1  - 592 23
PY  - 1981///
CY  - New York, 
PB  - Croom Helm ; Wiley, London, 
KW  - Invertebrate biology
ER  -