Geology of the Pennsylvanian-Permian in the Dunkard Basin /

Middletown, PA : Field Conference of Pennsylania Geologists, 2011

Late Pennsylvanian and Early Permian cyclic sedimentation, paleogeography, paleoecology, and biostratigraphy in Kansas and Nebraska /

by Pabian, Roger K.
[Lincoln] : Nebraska Geological Survey, Conservation and Survey Division, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln, 1989