http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Plant genera, their nature and definition
Lawrence, George H. M. (George Hill Mathewson)
a symposium by G.H.M. Lawrence [and others] With an introductory essay on Generic synopses and modern taxonomy by Theodor Just.
Chronica botanica (Periodical) ; v. 14, no. 3/4