Authors
Anna Bieniek
Poland
Zdzisław Kawecki
Poland
Jan Kopytowski
Poland
© 2012 Anna Bieniek, Zdzisław Kawecki, Jan Kopytowski, Jerzy Zielenkiewicz, published by Polish Society for Horticultural Sciences (PSHS)
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.