00418nam a2200157Ia 4500008004100000082001900041100001900060245003700079260004300116300000800159650001800167650001800185653002000203700002000223700001700243170901s1989    xx            000 0 und d  a574.5263bA25M  aAgrawal, V. P. 0aManagement of Aquatic Ecosystems  aDelhibNarendra Publishing Housec1989  a399  aLife sciences  aPure Sciences  aAquatic ecology  aAbidi, S. A. H.  aDesai, B. N.