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Title Assessment of undiscovered porphyry copper deposits within the range of the northern spotted owl, northwestern California, western Oregon, and western Washington [microform] / Michael F. Diggles, editor.
Imprint Menlo Park, Calif. : U.S. Geological Survey, 1991.


 GovDocs Federal/Fiche  I 19.76:91-377    AVAILABLE
Description 58 p. : ill., maps ; 28 cm + 27 maps.
Series U.S. Geological Survey open-file report ; 91-377.
Note Cover title.
Distributed to depository libraries in microfiche.
Shipping list no.: 92-2161-M.
Bibliog. Includes bibliographical references (p. 47-53).
Reproduction Microfiche. [Denver, Colo. : U.S. Geological Survey, 1992] 10 microfiches : negative.
Subject Spotted owl -- Habitat.
Copper ores -- Pacific States.
Other Author Diggles, M. F.
Geological Survey (U.S.)