A warm gratitude is expressed by the authors and partisipants to
Michail I. Jaroshevich
Gennady V. Vynaev
Evgenie G. Busko
Anatoly V. Metlitskiy
Igor M. Kochanovskiy
Tatyana A. Sobolevskaya
Vladimir V. Savchenko
Vladimir N. Reshetnikov
Marcel Hospers,
who contributed to the accomplishment of this work by their iseful advices, recommendations, comments and also by their permanent moral support.
Also thanks to
Dmitry I. Tretjakov
for the methodical help at selection of data on plants of the Belarus flora.
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