TY  - BOOK
AU  - Cushing D H
TI  - Some modern methods of fish detection: echo sounding, echo ranging and aerial scouting
U1  - 639.22 
PY  - 1952///
CY  - Rome
PB  - FAO
KW  - Aerial scouting
KW  - Echo Ranging
KW  - Echo sounding
KW  - Salt-water fisheries
N1  - reprinted from FAO fisheries bulletin, v.5, nos.3-4, 1952
ER  -