TY - BOOK TI - Publication. Field Museum of Natural History Geological series VL - v.6:no.19 (1937) UR - https://www.biodiversitylibrary.org/item/25130 PB - The Museum CY - Chicago, U.S.A PY - 1937 SN - 0376-1711 AU - Field Museum of Natural History. KW - Geology ER -