TY  - BOOK
AU  - x, x
AU  - Hawking,A.D.
TI  - Aquarium systems: x
SN  - x
U1  - 639.34/AQU 
PY  - 1981///
CY  - Lond
PB  - Academic Press
KW  - Aquariums
KW  - Fish culture
N1  - x
ER  -