[018-48] Transition Beds Between the St. Peter Sandstone and the Platteville Limestone
Transition Beds Between the St. Peter Sandstone and the Platteville Limestone Author: Bevan, Arthur
[018-47] The Character and Significance of the Basal Conglomerate of the Pennsylvanian System in Southern Illinois
The Character and Significance of the Basal Conglomerate of the Pennsylvanian System in Southern Illinois Author: Poor, R.S.
[018-46] The Devonian Strata of the Alto Pass Quadrangle
The Devonian Strata of the Alto Pass Quadrangle Author: Bassett, Chalres Fernando
[018-45] Will the Illinois Waterway Benefit the Illinois Coal Industry?
Will the Illinois Waterway Benefit the Illinois Coal Industry? Author: Utzig, Esther
[018-44] The Panama Gateway as Related to the Intercontinental Trade of South America
The Panama Gateway as Related to the Intercontinental Trade of South America Author: Blanchard, W.O.