1. Appold MS (2021) Applications of fluid inclusions to studies of sediment-hosted base metal ore deposits: case studies from the Central U.S.A. and Brazil. Mineral Assoc Can Short Course 49:47–72
2. Bastin ES (ed) (1939) Contributions to a knowledge of the lead and zinc deposits of the Mississippi Valley region. Geol Soc Am Spec Pap 24. https://doi.org/10.1130/spe24
3. Baxter JW, Bradbury JC (1989) The Illinois-Kentucky fluorspar mining district. In: Precambrian and Paleozoic geology and ore deposits in the midcontinent region, 28th International Geological Congress Field Trip Guidebook 1989, T147, pp 3–36
4. Baxter JW, Bradbury JC, Hester NC, Clare R, County H, (1973) A geologic excursion to fluorspar mines in Hardin and Pope counties, Illinois. Illinois State Geol. Surv Guidebook Series no. 11, Illinois State Geological Survey, Champaign, IL, pp 1–30
5. Bradbury JC, Baxter JW (1992) Intrusive breccias at Hicks Dome, Hardin County, Illinois. Illinois State Geol Surv Circ 550