TY - JOUR AB - AU - William J Petersen DA - 1972/9// DO - 10.17077/0031-0360.23169 IS - 9 VL - 53 PB - State Historical Society of Iowa PY - 1972 TI - Coal, Oil and Grain T2 - The Palimpsest UR - https://pubs.lib.uiowa.edu/palimpsest/article/id/23169/ ER -