@misc{Keith_E._O._Bisoniana_1981,
 author={Keith, E. O. and Ellis, J. E. and Phillips, R. W. and Dyer, M. I. and Ward, G. M.},
 volume={26},
 number={14},
 copyright={Rights Reserved - Free Access},
 address={Białowieża},
 journal={Acta Theriologica},
 howpublished={online},
 year={1981},
 language={eng ; sum. eng. ; pol.},
 type={Text},
 title={Bisoniana LXXVIII. Some aspects of urea metabolism in North American bison},
 URL={http://www.rcin.org.pl/Content/10894/PDF/BI002_2613_Cz-40-2_Acta-T26-nr14-257-268_o.pdf},
 keywords={American bison, Bison bison, metabolism, nitrogen budget, urea concentration, urea metabolism, metabolizm mocznika, strawność, bilans azotu, obieg azotu, Bizon amerykański, bydło domowe},
}