Authors
Marian Truszczyńsk
National Veterinary Research Institute, Pulawy, Poland
Monika Szymańska-Czerwińska
National Veterinary Research Institute, Pulawy, Poland
© 2013 Krzysztof Niemczuk, Marian Truszczyńsk, Monika Szymańska-Czerwińska, published by National Veterinary Research Institute in Pulawy
This work is licensed under the Creative Commons License.