000			00271 a2200109 4500
008			180628b xxu||||| |||| 00|
100			_aCushing, D.H
245			_aThe usesof Echo sounding for fisherman _cCushing, D.H
260			_b Springer
300			_a281, p
942			_2ddc _cBK
999			_c6372 _d6372