[026-031] Competition of Appalachian Coals, Fuel Oil, Natural Gas, and Other Fuels with Illinois Coal in the Illinois Coal Market Area
Competition of Appalachian Coals, Fuel Oil, Natural Gas, and Other Fuels with Illinois Coal in the Illinois Coal Market Area Author: Voskuil, W.H.
[029-042] An Atlas of the Geography of Illinois
An Atlas of the Geography of Illinois Author: Voskuil, W.H.
[033-056] A Method of Representing the Native Vegetation of a Small Area
A Method of Representing the Native Vegetation of a Small Area Author: Voskuil, Robert J.