TY - JOUR AB - AU - S. W. Beyer DA - 1905/1// DO - 10.17077/2160-5270.1085 IS - 1 VL - 15 PB - Iowa Geological Survey PY - 1905 TI - Mineral Production in Iowa in 1904 T2 - Iowa Geological Survey Annual Report UR - https://pubs.lib.uiowa.edu/igsar/article/id/954/ ER -