http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"This manual supersedes FM 17-12, 30 November 1950, including C 1, 13 November 1951, C 2, 16 June 1953, and C 3, 10 August 1954" -- page 1.
Cushing Library Ragan Military copy donated in memory of Robert L. Acklen, Jr., class of '63.