http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v. 2 Ligands, Optical Transition metals. v. 3 organometallic molecules, nonaqueous solvents v. 4 cubic crystal fields, v. 5 cromium (III) complexes, copper complexes.
Publication suspended in 1973; resumed in 1982.