000 00421nam a2200121 4500
245 _aManual on methods for the assessment of secondary productivity in fresh water
_cedited by W. T. Edmondson and G. G. Winberg
710 _aEdmondson, W. T.
710 _aWinberg, G. G.
260 _aOxford
_bBlackwell Scientific Publications
_c1971
300 _axx,358p.; 21cm.-
490 _aIBP handbook;no.17
082 _a574.52632
_bEDM
999 _c35148
_d35148