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)

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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)

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  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.

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  Douglas W. Sprague papers

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  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.

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  Reminiscences -- State Mining & Geology Board - Reminiscences of a Member and Its Special Representative, from 1976 to 1984; by Douglas W. Sprague, (2012, Mar. 11)

  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.

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  Masters theses - Proceedings

  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.

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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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  California State Mining and Geology Board

  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