http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Fiftieth annual report of Director of Geological Survey to Secretary of Interior
1 online resource (ii+87+ovolumes pages)
Annual report on activities and finances of Geological Survey. Reports include summaries of State field investigations and Geological Survey branch operations, and lists of publications.
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2014. digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.