http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
(Sonchus oleraceus L. Familie Compositae)
(Sonchus olaraceus L. Family Compositae)
3 unnumbered pages : color illustrations ; 25 cm
door I.B. Pole Evans en K.A. Lansdell ; Unie van Zuid-Afrika, Departement van Landbouw = The Sow thistle : (Sonchus oleraceus L. Family Compositae) / by I.B. Pole Evans and K.A. Lansdell ; Union of South Africa, Department of Agriculture.
Bulletin (South Africa. Department of Agriculture) ; no. 6, 1920