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
Algemeen Indisch Dagblad (1957-11-21, p. 3): parliamentary budget debate for 1957 over two days with eighteen speakers. PKI women MPs speak: Mrs. Umi Sardjono on Justice Ministry staffing, prisons, foreigner control and a juvenile court; Mrs. Sundari Abdulrachman ('Bundari' in text) on economising, regional information
Donald Hindley's 1961 ANU PhD thesis on the Indonesian Communist Party under the Aidit leadership, 1951-1961, covering PKI strategy, party-building, finances, mass organisations and elections. Section 'Women' (pp. 422-448, esp. 'Gerwani', pp. 428-441) traces Gerwis from its founding on 4 June 1950 (about 500 members) t