Contributors: Albert Eugene Roberts, Betsy A. Weld, Flora K. Walker, Geological Survey (U.S.), George Hamilton Davis, George J. Neuerburg, Harley J. Knebel, Jacob Eugene Gair, L. G. Davis, Nancy A. Wright, Robert Earl Wallace, Victor W. Adams, William H. Raymond, John F. Windolph, Kathleen T. Iseri, Leland D. Hauth, Leonard A. Wood, Paul Lincoln Williams, Robert Ugstad King, Theodore Botinelly, Gary W. Horton, James Jennings Norton, John R. Watterson,
2 ebooks
Publisher: U.S. Department of the Interior, Geological Survey
Published: 1949
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