- Aaron Ruble Civil War Letters, 1861/18621
- Clark and Krebs, Civil and Mining Engineers, Miscellaneous Letters and Records, 1912/19141
- Douglas G. Williamson, Drilling Contractor, Miscellaneous Records, 1910/19241
- Ephemera Collection, 1900/1993, bulk 1900/19301
- Harry Halliday, Author, Early History of Oil & Gas in Calhoun County, 19771
- Herbert P. McGinnis Papers, 1908/19671
- Hugh Sayre, Collector, Papers, 1872/19531
- James Edwin Green, Photographer, Glass Plate Negatives and Other Material, 1900/1925, bulk 1900/19181
- Kendall Family of Marion County Papers, 1849/1959, bulk 1900/19451
- Leases for Rights to Oil and Gas Properties, 1889/19121
- Louis Reed and Mildred Johnston Papers, 1918/19201
- Lowther Oil Company Records, 1900/19051
- Matheny-Stutler Correspondence, 1945/19691
- Pittenger Family Letters, 1841/18751
- Rush Meadows Papers, 1901/19671