http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
History of purple as a status symbol in antiquity
REINHOLD,Meyer: -- History of purple as a status symbol in -- antiquity. - Bruxelles:Latomus 1970.73 S.8 -- (Collection Latomus.Vol.116.) -- 1972:2285 a. -- Th.-