Geologic investigations in the Lake Valley area, Sierra County, New Mexico by J.M. O'Neill, ed. - Denver, Colo. U.S. Geological Survey 2002. - VII, 78 S Ill., graph. Darst., Kt 1 Kt.-Beil. - U.S. Geological Survey professional paper 1644 . Literaturverz. S. 76 - 78. ISBN: 0607969571 Subjects--Topical Terms: Lake Valley Geologie. Dewey Class. No.: 557.8967 / G3454