http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Gold and silver conversion tables, giving the coining values of troy ounces of fine metal, and the weights of fine metal represented by given sums of United States money
Title from title screen (viewed June 18, 2014).
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
Bulletin of the United States Geological Survey ; no. 2