Recommended CitationWitczak, M. W., and C. W. Lovell. A Generalized Investigation of Potential Aggregate Availability by Regional Geomorphic Units within the Adjacent 48 States. Publication FHWA/IN/JHRP-71/02. Joint Highway Research Project, Indiana Department of Transportation and Purdue University, West Lafayette, Indiana, 1971. doi: 10.5703/1288284313793.
Joint Highway Research Project
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