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NATIONAL ACADEMY OF SCIENCES PANEL GERARD A ROHLICH, Department of C i v i l Engineering, U n i v e r s i t y of Texas at A u s t i n , A u s t i n , Texas, chairman LAWRENCE 0 BAGNALL, Department of A g r i c u l t u r a l Engineering, U n i v e r s i t y of F l o r i d a , G a i n e s v i l l e , F l o r i d a FRED D BENNETT, Entomologist-in-Charge, Commonwealth I n s t i t u t e of B i o l o g i c a l C o n t r o l , Curepe, T r i n i d a d , West Indies DANIEL S HARTMAN, P 0 Box 1774, C r y s t a l River, F l o r i d a JAMES HENTGES, Department of Animal Science, U n i v e r s i t y of F l o r i d a , G a i n e s v i l l e , F l o r i d a DONALD F LIVERMORE, Department of Mechanical Engineering, The U n i v e r s i t y of Wisconsin, Madison, Wisconsin RICHARD R YEO, Department of Botany, U n i v e r s i t y of C a l i f o r n i a , Davis, C a l i f o r n i a NOEL D VIETMEYER, Professional Associate, Board on Science and Technology f o r I n t e r n a t i o n a l Development, O f f i c e of the Foreign Secretary National Academy of Sciences, Washington, D C , Staff Study Director ROSE AMESER, Board on Science and Technology f o r I n t e r n a t i o n a l Development, O f f i c e of the Foreign Secretary, National Academy of Sciences, Washington, D C , S t a f f Officer VERNON MYERS, Aquatic Weed C o n t r o l , F l o r i d a Game and Frest Water Fish Commission, Lakeland, F l o r i d a , Advisor - 14 -