000 00258 a2200109 4500
008 190227b xxu||||| |||| 00| 0
100 _aWelch, P.S.
245 _aLimnological methods /
_cP.S.Welch
260 _aDelhi
_bNPH
_c2003
300 _a381p.
942 _2ddc
_cBK
999 _c9331
_d9331