00968nam0-2200313---450-99000973368040332120130523150621.0000973368FED01000973368(Aleph)000973368FED0100097336820130522d1972----km-y0itay50------baengGBa-------001yyConservation and productivity of natural watersedited by R.W. Edwards, D.J. GarrodLondonThe zoological society of London by Academic press1972XV,318 p., [1] c. di tav.ill.23 cmSymposia of the Zoological Society of London29IdrogeologiaEdwards,R.W.Garrod,D.J.ITUNINARICAUNIMARCBK990009733680403321MA5/413120DINGEDINGEConservation and productivity of natural waters373953UNINA