Walcott, Charles D. Director U. S. Geological Survey books & textbook
Water-Supply and Irrigation Papers of the U. S. Geological Survey - #15 Operations At River Stations 1897-Part 1
Walcott, Charles D. Director U. S. Geological Survey
Government Printing Office /1898T Paperback
(Two Volumes). The Seventeenth Annual Report of the United States Geological Survey 1895 - 96
Charles D. Walcott Director U. S. Geological Survey (USGS)
USGS, Wash. D. C., 1896 /1896-01-01 Hardcover
