Bibliography of the geology and mineral resources of Oregon :
eighth supplement,
January 1, 1980, to December 31, 1984 /
by Klaus K.E. Neuendorf ; compiled and indexed by GeoRef Information System.

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Limited (search only)   no.103(1987) University of Illinois at Urbana-Champaign
Limited (search only)   no.103(1987) University of Illinois at Urbana-Champaign