@book{bhlitem25222, title = {Publication. Field Museum of Natural History Geological series}, volume = {v.6:no.25 (1939)}, copyright = {In copyright. Digitized with the permission of the rights holder.}, url = {https://www.biodiversitylibrary.org/item/25222}, note = {https://www.biodiversitylibrary.org/bibliography/42259}, publisher = {Chicago, U.S.A, The Museum, 1910-1945}, author = {Field Museum of Natural History.}, year = {1939}, pages = {16}, keywords = {Geology}, }