- Aaron Ruble Civil War Letters1
- Clark and Krebs, Civil and Mining Engineers, Miscellaneous Letters and Records1
- Douglas G. Williamson, Drilling Contractor, Miscellaneous Records1
- Ephemera Collection1
- Harry Halliday, Author, Early History of Oil & Gas in Calhoun County1
- Herbert P. McGinnis Papers1
- Hugh Sayre, Collector, Papers1
- James Edwin Green, Photographer, Glass Plate Negatives and Other Material1
- Kendall Family of Marion County Papers1
- Leases for Rights to Oil and Gas Properties1
- Louis Reed and Mildred Johnston Papers1
- Lowther Oil Company Records1
- Matheny-Stutler Correspondence1
- Pittenger Family Letters1
- Rush Meadows Papers1