http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Department of the Interior. United States Geological Survey. Charles D. Walcott, Director. Results of spirit leveling in the State of New York for the years 1896 to 1905
Geological Survey bulletin 281; Spirit leveling in New York, 1896-1905
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ProQuest U.S. Serial Set Digital Collection