000 00265 a2200109 4500
008 190219b xxu||||| |||| 00| 0
100 _aSanthanam
245 _aA manual of freshwater ecology /
_cSanthanam
260 _aDelhi
_bDaya Pub
300 _a829p.
942 _2ddc
_cBK
999 _c8558
_d8558