http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
239.439 -- AKERS, Susan Grey: -- Simple Library Cataloging. 3. ed., rewr. - Chi- -- cago: American Library Association (1945). -- 197 S., mit Abb. 8° -- 1950:1375.