Authors
Juliusz Chojnacki
Agricultural University, Szczecin
Sylwia Machula
Agricultural University, Szczecin
Andrzej Orłowski
Sea Fisheries Institute, Gdynia, Poland
© 2007 Juliusz Chojnacki, Sylwia Machula, Andrzej Orłowski, published by University of Gdańsk
This work is licensed under the Creative Commons License.