000 00365 a2200109 4500
008 181218b xxu||||| |||| 00| 0 eng d
100 _a Edmondson,W.T
245 _aA manual on methods for the assessment of secondary productivity in freshwater /
_cW. T. Edmondson
260 _aOxford
_b Blackwell Scientific Publications,
_c1971
300 _a358p.
942 _2ddc
_cBK
999 _c7629
_d7629