000 00363 a2200109 4500
008 181127b xxu||||| |||| 00| 0 eng d
100 _a Edmondson W.T
245 _aA manual on mthods for the asseddment of secondary productivity in freshwater /
_c W.T. Edmondson
260 _aOxford
_bBlackwell Scientific Publications,
_c1971
300 _a358p.
942 _2ddc
_cBK
999 _c7456
_d7456