Institution: | 1. Botanical Institute of Czechoslovak Academy of Sciences, CS-252 43, Pr?honice, Czechoslovakia 2. Institute of Experimental Biology and Ecology of S. A. S., Sienkiewiczova 1, CS-814 34, Bratislava, Czechoslovakia 3. Botanical Institute of Academy of Sciences, Pyongyang, D. P. R. K. (North Korea)
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