http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
The Synthesis and properties of some heterohelicenes
GROEN, Marinus Bernard: -- The Synthesis and properties of some -- heterohelicenes. - Groningen 1970.129 S. -- m.Fig.u.Tab.8° -- Groningen, nat.wiss.Diss.1970. -- 1976! -- M.