A. R. Troell, “Depositional Facies of Toronto Limestone Member (Oread Limestone, Pennsylvanian), Subsurface Marker Unit in Kansas”, kgsbulletin, no. 197, pp. 1–29, Jan. 1969, Accessed: Nov. 03, 2024. [Online]. Available: https://journals.ku.edu/kgsbulletin/article/view/22222