De Nieuwsgier front-page report (6 Dec 1954) on a mass demonstration at Medan Merdeka, Jakarta, organised by the West Irian liberation committee with women's organisations, demanding incorporation of Irian and rupture with the Netherlands. Speakers included Mrs. Sudarman Hadikusumo, Mrs. Kartowijono (Perwari) and Mrs.
Seven-page Ministry of Information file of short official biographies; only the first concerns Gerwani: parliamentary member no. 86 Umi Sardjono (b. Salatiga 1923, PKI list for East Java), with her career from Semarang telephone office to Kediri and Gerwani.
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.