@misc{Bergstrom_[?]_Zoo_1929,
 author={Bergstrom, [?]},
 editor={Rząśnicki, Adolf (1884–1953). Kolekcjoner},
 copyright={Rights Reserved - Restricted Access},
 howpublished={online},
 year={1929},
 language={pol},
 title={Zoo Stockholm},
 keywords={hybrids, mammals, horse family, Mammalia, Equidae, photograps of animals, breeding centers, zebras, zoo, zoo animals, Grant's zebra},
}