Authors
Anna Sawa
UTP University of Science and Technology, Department of Cattle Breeding, Bydgoszcz, Poland
Mariusz Bogucki
UTP University of Science and Technology, Department of Cattle Breeding, Bydgoszcz, Poland
© 2017 Anna Sawa, Mariusz Bogucki, published by National Research Institute of Animal Production
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.