@misc{Petrusewicz_K._The_1983,
 author={Petrusewicz, K. and Górecki, A. and Grodziński, W. and Kozłowski, J.},
 volume={28},
 number={Suppl. 1},
 copyright={Rights Reserved - Free Access},
 address={Białowieża},
 journal={Acta Theriologica},
 howpublished={online},
 year={1983},
 language={eng},
 type={Text},
 title={The concept of productivity},
 URL={http://www.rcin.org.pl/Content/25635/PDF/BI002_2613_Cz-40-2_Acta-T28-Supl.173-205_o.pdf},
 keywords={productivity, ecology, bank vole},
}