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Geology of world gem deposits
edited by S. L. VanLandingham
Bok Språk ikke angitt 1985
Paleoecology and microfloristics of Miocene diatomites from the Otis Basin-Juntura region of Harney and Malheur Counties, Oregon
by Sam L. Vanlandingham
Bok Engelsk 1967
Miocene non-marine diatoms from the Yakima region in South Central Washington
VanLandingham, Sam L.
Bok Engelsk 1964