CIA intelligence survey of the PKI's history, structure and front organisations, May 1955, before the September 1955 elections. Section III.E (report pp. 49-50) profiles Gerwani: founded 1950 as Gerwis, renamed Gerwani at the March 1954 congress, 25,000+ members, S.K. Trimurti general chairman and Umi Sardjono chairman
US Monthly Indonesian Press Survey (1958): Gerwani branches, Kowani secretariat, Sulami
US Monthly Indonesian Press Survey (1958) extracts: Kowani secretariat (Maria Ulfah Santoso chair, Mudigdio of Gerwani treasurer); Harian Rakjat's 30 Dec 1957 list of Gerwani's working council (Umi Sardjono chair; Mudigdio, Suharti, S.K. Trimurti deputies; Kartinah secretary-general; Sulami deputy; Suwati Sutrimo Sudji
From politics to mysticism: S.K. Trimurti in her own words (Tempo, 21 Apr 1990)
Tempo profile (21 April 1990), in S.K. Trimurti's own first-person voice, of her life from teacher and Partindo cadre to labour minister and spiritualist. She says she co-founded Gerwis around 1950 (Ketua III, Yogyakarta), that Gerwis became Gerwani at its third congress under Umi Sardjono, and that in 1965 she quit Ge