2 literature references for Trifolium patulum Tausch:

Author: Heywood,V.H. & Ball,P.W.
Year: 1968
Title:
Source: Leguminosae.In:Flora Europaea Vol.2.ed.Tutin,T.G.et al.
Author: Tausch,I.F.
Year: 1828
Title:
Source: Syll.Pl.Nov.Ratisbon.(Konigl.Baier.Bot.Ges.)Vol.2