H
YDROACOUSTICS
A
NNUAL
J
OURNAL
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TART
N
EW
V
OL
20
S
EARCH
S
TATISTICS
PAS
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G
DANSK
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IVISION
M. Gliwicz
(142)
Papers
vol. 2, 1999,
pp. 57-60:
M. Godlewska, ...
Detecting Changes in Fish Distribution by Fixed-Location Horizontally-Directed Echosounder