@periodical{UBHD-1089340, organization={University of Iowa}, title={University of Iowa studies in natural history}, publisher={Univ.}, address={Iowa City, Iowa}, year={1918-1971}, language={eng}, issn={0041-9656}, library={UB [Signatur: ZSN 2405 B] ; UB [Signatur: H 254-25-8]}, }