@book{bhlitem25706, title = {Bulletin }, volume = {v. 21 (1950)}, copyright = {In copyright. Digitized with the permission of the Chicago Field Museum. For information contact dcc@library.uiuc.edu.}, url = {https://www.biodiversitylibrary.org/item/25706}, note = {https://www.biodiversitylibrary.org/bibliography/5097}, publisher = {[Chicago, Ill.], The Museum, [1944-1966]}, author = {Chicago Natural History Museum.}, year = {1950}, pages = {100}, }