http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Results of spirit leveling in Oregon, 1896 to 1913, inclusive
1 online resource (175 pages, I page of plate) : illustration.
Title from title screen (viewed June 30, 2014).
"Work done in cooperation with the state from 1905 to 1913, inclusive, John H. Lewis, State Engineer."
Marshall, R. B. (Robert Bradford), 1867-1949.
Bulletin (Geological Survey (U.S.)) ; no. 556