@misc{Okołów_H._Some_1972,
 author={Okołów, H.},
 volume={17},
 number={31},
 copyright={Rights Reserved - Free Access},
 address={Białowieża},
 journal={Acta Theriologica},
 howpublished={online},
 year={1972},
 language={eng},
 title={Some descriptive characters of the skull in Microtus},
 type={Text},
 URL={http://rcin.org.pl/Content/10123/PDF/BI002_2613_Cz-40-2_Acta-T17-nr31-413-417_o.pdf},
 keywords={skull, Microtus arvalis, Microtus oeconomus, descriptive characters of skull, czaszka, cechy opisowe czaszki, Nornik polny, Nornik północny},
}