Java-Bode, 11 February 1957, p. 2: Jakarta women's organisations formed a committee to prepare International Women's Day on 8 March: chair Mrs Jahja Malik (Perwamu), vice-chair Mrs Hermen, first secretary Mrs Kusnan of Gerwani, second secretary Mrs Darpin Busono (Baperki), treasurers Mrs Mandagi and Mrs Prawoto.
Harian Rakjat issue of 9 March 1957, very noisy OCR. Page 1 reports the International Women's Day exhibition (handicrafts, cooking, costumes, foreign stalls) in Jakarta, where Umi Sardjono (Gerwani leader) is among women leaders present alongside Fatmawati; the committee of ten women's organisations is chaired by Yahya
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.