TY  - BOOK
AU  - Cushing,D.H.
TI  - Detection of fish,
T2  - International series of monographs in pure and applied biology. Division: zoology,
SN  - 0080171230
U1  - 639/.2/028 
PY  - 1973///]
CY  - Oxford, New York
PB  - Pergamon Press
KW  - Echo sounding in fishing
ER  -