http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Digest of patents issued by U.S., including years 1839, 1840, and 1841
Published by act of Congress, under superintendence of Commissioner of Patents, Henry L. Ellsworth, to which is added present laws relating to patents
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2014. digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.