Affiliation: | (1) INEP, Institute of Pesticides and Environmental Protection, Banatska 31b, P.O. Box 46;(2) Institute of Botany, University of Belgrade, Takovska 43, YU-11000 Belgrade, Yugoslavia;(3) Present address: Center for Multidisciplinary Studies of the Belgrade University, S. Penezica-Krcuna 35, YU-11000 Belgrade, Yugoslavia |