[056-28]Clay Mineral Variation in a Pennsylvanian Underclay
O’Brien, Neal R. Clay Mineral Variation in a Pennsylvanian Underclay 056-28-print
[056-10]Differentiation of Some Pennsylvanian Underclays by Their Clay Mineral Composition
O’Brien, Neal R. Differentiation of Some Pennsylvanian Underclays by Their Clay Mineral Composition 056-10-print
[057-14]Two Late Woodland Archaeological Sites in Lake County, Illinois
O’Brien, Patricia J. Two Late Woodland Archaeological Sites in Lake County, Illinois 057-14-print
[057-09]Correlation of Kaolinite Morphology and Crystallinity
O’Brien, Neal R. and Orlopp, Donald E. Correlation of Kaolinite Morphology and Crystallinity 057-09-print
[061-34] Devonian Stratigraphy and Biostratigraphy at Dutch John Mountain, Lincoln County, Nevada
Gordon, Joan E., Kathryn G. O’Brien, and R.L. Langenheim, Jr. Devonian Stratigraphy and Biostratigraphy at Dutch John Mountain, Lincoln County, Nevada 061-34-print