1. Darrah, W. C. 1970. A critical review of the Upper Pennsylvanian floras of the eastern United States with notes on the Mazon Creek floras of Illinois: Gettysburg, 220 pp.
2. Gluskoter, H. J. and Hopkins, M. E. 1970. Distribution of sulfur in Illinois coals, pp. 89-95. In, Smith et al., 1970, Depositional environments in parts of the Carbondale Formation–western and northern Illinois: Illinois Geol. Surv. Field Guidebook ser 8.
3. A remarkable Pennsylvanian fauna from the Mazon Creek area, Illinois;Johnson;Jour. Geol.,1966
4. Some fern-like fructifications and the spores from the Mazon Creek compression flora of Illinois;Pfefferkron;Illinois State Geol. Surv. Circ.,1971
5. Pennsylvanian invertebrates of the Mazon Creek area, Illinois;Richardson;Fieldiana: Geol.,1956