http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Volume 1 originally published in single magazine form as MAD 1-6, Vol. 2 originally published in single magazine form as MAD 7-12, Vol. 3 originally published in single magazine form as MAD 13-18"--Title page verso.