@misc{Pokrovski_A._V._Natural_1968,
 author={Pokrovski, A. V. and Bolshakov, V. N.},
 volume={13},
 number={9},
 copyright={Rights Reserved - Free Access},
 journal={Acta Theriologica},
 address={Białowieża},
 howpublished={online},
 year={1968},
 language={rus ; sum . eng ; pol},
 title={Natural and potential fertility of two species of high mountain voles},
 type={Text},
 URL={http://rcin.org.pl/ibs/Content/9690/PDF/BI002_2613_Cz-40-2_Acta-T13-nr9-117-128_o.pdf},
 keywords={Alticola roylei argentata, Alticola strelzovi, natural fertility, potential fertility, voles},
}