2 literature references:

Author: Fantz,P.R.
Year: 1993
Title:
Source: HortScience 28(6):674-676 Cult. Centrosema & Clitoria in USA
Author: Fantz,P.R.
Year: 1993
Title:
Source: Novon 3(4):352-355. Notes on Clitoria in Southeast Asia