Manuscripts
Reports -- Economics of Mining and Processing Sand, Rock and Gravel from an Offshore Aggregate Deposit Near San Diego, California by Douglas W. Sprague, (1971)
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Masters theses -- Geology and Economic Significance of Pleistocene Channel and Terrace Deposits of the San Diego Mainland Shelf, California by Douglas W. Sprague, (1971, June)
Manuscripts
The first series consists of material related to Douglas W. Sprague's tenure as a member and executive officer of the California State Mining and Geology Board from 1976 through 1985.
mssSprague2
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Reports -- Mineral Land Survey Sand and Gravel Resource Zones, Western San Diego County, California for San Diego Rock County, (1979)
Manuscripts
The first series consists of material related to Douglas W. Sprague's tenure as a member and executive officer of the California State Mining and Geology Board from 1976 through 1985.
mssSprague2
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Sand and gravel industry; Reclamation projects
Manuscripts
The first series consists of material related to Douglas W. Sprague's tenure as a member and executive officer of the California State Mining and Geology Board from 1976 through 1985.
mssSprague2
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Douglas W. Sprague papers
Manuscripts
The first series consists of material related to Douglas W. Sprague's tenure as a member and executive officer of the California State Mining and Geology Board from 1976 through 1985.
mssSprague2
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Correspondence -- To Ms. Denis Jones, Executive Director, California Mining Association from Douglas W. Sprague, (2000, July 10)
Manuscripts
The first series consists of material related to Douglas W. Sprague's tenure as a member and executive officer of the California State Mining and Geology Board from 1976 through 1985.
mssSprague2
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Reports -- Aggregate Resource Management Technical Advisory Committee, (1974)
Manuscripts
The first series consists of material related to Douglas W. Sprague's tenure as a member and executive officer of the California State Mining and Geology Board from 1976 through 1985.
mssSprague2