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H157     Halwart, Matthias

               Fish as biocontrol agents in rice: the potential of common carp cyprinus carpio(L.) and Nile tilapia orechromis niloticus(L.) / Matthias Halwart . - Germany : Margraf Verlag,1994 . - iii,169p.; fig., tables . - Tropical agroecology; 8 .

               Includes bibliography and index

               ISBN: 3823612417