@misc{Caboń-Raczyńska_K._Estimation_1977, author={Caboń-Raczyńska, K. and Ruprecht, A. L.}, volume={22}, number={25}, copyright={Rights Reserved - Free Access}, address={Białowieża}, journal={Acta Theriologica}, howpublished={online}, year={1977}, language={eng ; sum. eng. ; pol.}, title={Estimation of population density of the common vole in Poland: an analysis of owl pellets}, type={Text}, URL={http://rcin.org.pl/Content/16282/PDF/BI002_2613_Cz-40-2_Acta-T22-nr25-349-354_o.pdf}, keywords={Microtus arvalis, owl pellets, zrzutki sów, nornik}, }