Authors
Tadeusz Zachara
Forest Research Institute, Department of Silviculture and Genetics of Forest Trees, Raszyn, Poland
Wojciech Gil
Forest Research Institute, Department of Silviculture and Genetics of Forest Trees, Raszyn, Poland
© 2021 Tadeusz Zachara, Wojciech Gil, published by Forest Research Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.