Merdeka, 25 April 1951 (hlm. 2): plans for May Day 1951 by a central committee (SOBSI, KABM) assisted by the Peace Defence Committee, Lekra, Pemuda Rakyat, Sakti and Gerwis, framed as defence of world peace.
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.
US FBIS Daily Report (Foreign Radio Broadcasts), page of 1 May 1958 carrying an NCNA English item of 28 April 1958: Mme Tanti Aidit and Mme Sutarsih, members of the central committee of the 'Indonesian Women's Movement' (Gerwani), arrived in Peking by air as guests of the National Women's Federation to attend May Day.