000 00265 a2200109 4500
008 190225b xxu||||| |||| 00| 0
100 _aWelch, P. S.
245 _aLimnology /
_cP. S. Welch
260 _bMc. Grow Hill Book Company Inc.
300 _a236p.
942 _2ddc
_cBK
999 _c9039
_d9039