Manuscripts
Reports -- Mineral Land Survey Sand and Gravel Resource Zones, Western San Diego County, California for San Diego Rock County, (1979)
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Reports -- Economics of Mining and Processing Sand, Rock and Gravel from an Offshore Aggregate Deposit Near San Diego, California by Douglas W. Sprague, (1971)
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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Papers (documents) -- Conservation of Mineral Resources (California's Balanced Approach) by Jan Denton, (1982, Oct.)
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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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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Books -- Natural Resources Build Cities by Don Reining, (1996)
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