(1)
Sawin, R. S.; Franseen, E. K.; Watney, W. L.; West, R. R.; Ludvigson, G. A. New Stratigraphic Rank for the Carboniferous, Mississippian, and Pennsylvanian in Kansas. CRES 2009, No. 256, 1-4. https://doi.org/10.17161/cres.v0i256.11846.