000 00334 a2200109 4500
008 190117b xxu||||| |||| 00|
100 _aWilliam Edwin Ricker
245 _aMethods for assessment of fish production in fresh waters /
_cWilliam Edwin Ricker
260 _aOxford
_b Blackwell Scientific
_c1968
300 _a313p.
942 _2ddc
_cBK
999 _c7844
_d7844