Full-page notice in the Surakarta magazine Bentara listing the organising committee of the 1 May 1951 Labour Day commemoration, a left united front dominated by SOBSI unions and including Gerwis.
Abadi, 15 Mar 1952, p. 3: Trimurti's open letter (while detained) to women's organisations before a Kongres Wanita Indonesia conference, proposing majority voting and a minimum programme on schools, rice prices, women's and child labour, and trafficking.
US State Department Monthly Indonesian Press Survey (nos. 11-21, 1956), p. 457: an item on the second session of the SOBSI national council, opened in Jakarta on 21 February 1956. It lists women present, including Setiati Surasto of Sarbupri and Sri Ambar of the labour-ministry union SB Kemperbu, with Tuti, Rantijem an