000 00240 a2200097 4500
008 190227b xxu||||| |||| 00| 0
100 _aWard, H. B.
245 _aFreshwater biology /
_cH. B. Ward, G. C. Whipple
300 _a236p.
942 _2ddc
_cBK
999 _c9402
_d9402