http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 volume (loose-leaf) : illustrations ; 28 cm.
"Supersedes AR 420-17, 2 January 1968; AR 420-20, 15 February 1967 ... interim change to AR 420-30, para 3-3, Excess reporting criteria"--P. i.
"Reprint which includes current pages from changes 1-2"--P. i.