TY - BOOK TI - Boletín del Instituto Geológico de México VL - no. 30-31 (1913-16) UR - https://www.biodiversitylibrary.org/item/95682 PB - [Instituto] CY - México PY - 1913 N1 - Each no. has also a distinctive title. --- Title from cover. AU - Instituto Geológico de México KW - Geology KW - Mexico KW - Paleontology ER -