Suara Kalimantan (Banjarmasin), 9 Mar 1955, p. 3: report on International Women's Day (8 March 1955), about 1,500 women, mostly Chinese-Indonesian, with a lecture on Clara Zetkin by Nj. Soeparsono and a speaker from Gerwani.
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
De Waarheid, 21 Sep 1955, p. 5: air-mail report on the PKI's 1955 election campaign: Aidit speaking to 700,000 in Yogyakarta, 550,000 in Semarang, Njoto and Lukman elsewhere. In Jakarta, Umi Sardjono, chair of Gerwani, explained why she stands as a non-party candidate on the PKI list, saying its programme matches the d