http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v.1. Physical fact and function. - xi, 438 p. - 1968 -- v.2. edited by Donald F. H. Wallach. - x, 326 p. - 1973 -- v.4. - xv, 526 p. - 1982.