Geology of the Springfield Coal Member in Indiana: A review. (In: Depositional and structural history of the Pennsylvanian system of the Illinois Basin. Part 2. Invited Papers. J.E.Palmer and R.R.Dutcher, editors)
Reference:
Ault,C.H. et al. (1979)
Geology of the Springfield Coal Member in Indiana: A review. (In: Depositional and structural history of the Pennsylvanian system of the Illinois Basin. Part 2. Invited Papers. J.E.Palmer and R.R.Dutcher, editors) International Congress on Carboniferous Stratigraphy and Geology,Compte Rendu,9th,Field Trip
P. 43- 49