De Nieuwsgier report (31 May 1955, p. 2) on a PKI anniversary/election rally in Jakarta where Aidit spoke. Mrs. Oemi Sartono (Umi Sardjono), described as a non-party Gerwani member, said she chose the PKI because it is a choice of being for or against the people; non-party candidate Astrawinata also spoke.
De Locomotief, 1 June 1955: report of a PKI mass meeting in Jakarta where Aidit backs the Ali cabinet and urges peaceful election campaigning. Mrs Umi Sardjono, introduced as a non-party Gerwani member and PKI candidate, says she chose the PKI because it is a choice of being for or against the people. Date: the party's
Indische Courant voor Nederland, 8 Jun 1955, p. 2: report on the PKI's 35th-anniversary rally at Merdeka Square, Jakarta. Umi Sardjono, general chairwoman of Gerwani, attacks feudalism and large landownership; Aidit speaks on Muslim-nationalist-communist unity and Dutch profits, with slogans against Dutch and landlords
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