http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
the description of the archaeological sites excavated during the 1970 field season including Ch-1, Ch-43, Ch-70, Ch-75, Pu-82 and Ch-90
"Research funded under National Park Service Contract 14-10-7: 931-42."