[030-075] The Preglacial Rock River Valley as a Source of Groundwater for Rockford*
The Preglacial Rock River Valley as a Source of Groundwater for Rockford* Author: Workman, L.E.
[030-074] Preliminary Study of Lake Michigan Sediments at Evanston Illinois
Preliminary Study of Lake Michigan Sediments at Evanston Illinois Author: Todd, Jean P.
[030-073] Geology ad Groundwater Resources of the Bedrock at Rockford
Geology ad Groundwater Resources of the Bedrock at Rockford Author: Payne, J. Norman
[030-072] Identification Key for Illinois Plant Fossils
Identification Key for Illinois Plant Fossils Authors: Noe, A.C. and Janssen, R.E.
[030-071] Pre-Cambrian Rocks of Central Colorado: Their Correlation by Means of Heavy Mineral Analyses
Pre-Cambrian Rocks of Central Colorado: Their Correlation by Means of Heavy Mineral Analyses Author: Jahns, Richard H.