CIA information report, 14 April 1950: 'Communist Developments in Indonesia', on the PKI, FDR and Partai Murba after the 1948 Madiun revolt, their alliance, infiltration of labour and army, and factions. Tan Ling Djie, Abdul Madjid, Sakirman and Wikana are named; Umi Sardjono appears only as head of one Partai Buruh In
Straits Times, 8 Aug 1955, by P. A. van der Poel (lead only). Describes how the Communist organisation is preparing for the 1955 Indonesian elections, winning support through sport, religion and an appeal to 'non-party' people. Matched on Umi Sardjono; lead does not name her.
Bintang Merah special issue, vol. 1: documents of the VI National Congress of the PKI, Jakarta 7-14 September 1959 (Yayasan Pembaruan, 1960). Contains Aidit's opening speech, the Central Committee's General Report, and Programme and Constitution changes. Gerwani is not named; on women it records growing women's members
Pravda no. 213, 1965 (excerpt; issue likely 1 August). Official communique on a PKI delegation's stay in the USSR, 7-31 July 1965: Aidit (head), Karel Supit, Ruslan Kamaluddin, Nungtjik A.R., candidate CC member Umi Sardjono, and an Aliarcham Academy representative; visits to Uzbekistan and Moscow, talks with Brezhnev'
UK Foreign Office file FO 371/180326 (Feb-Aug 1965): embassy telegrams, letters and Antara extracts on the PKI's growth before the coup: its 45th anniversary, Aidit's speeches, Mao's greeting, Sino-Soviet positions and Sukarno's leftward drift. Gerwani items: Antara of 9 June reports Sukarno addressing Gerwani, chaired
Historia article (2019) on women's wings of parties in the 1955 election (Perwamu, Parkiwa, Wanita Demokrat, Aisyiyah, Bhayangkari), noting the PKI grew close to Gerwani and that Mudigdio and Umi Sardjono entered the DPR for the PKI. Context on Gerwani and elections.