Lewis, Robert Strong, 1882- Elements of mining / Robert S. Lewis. - New York : J. Wiley 1964 - xi, 768 p. : illus., maps. ; 24 cm. Includes bibliographies. ISBN: (pbk.) LCCN: 64014990 Subjects--Topical Terms: Mining engineering. LC Class. No.: TN145 / .L68 1964 Dewey Class. No.: 622 / LEW