De Waarheid, 16 Jan 1952, p. 4: report on workers' protests against Sjahrir's PSI splitting unions (the Perbupri breakaway from SOBSI's plantation union Sarbupri in Jember). A closing section says the Gerwis annual congress in Surabaya unanimously demanded abolition of the Round Table Agreement and return of New Guinea
De Nieuwsgier, 6 Dec 1952: representatives of 18 parties and organisations in Surabaya, under the PNI, urge the government to clarify whether the 17 October 1952 affair was a coup, to act against all involved and to implement the Sophiaan motion. Gerwis is among the listed attendees (with PKI, PNI, SOBSI, Murba, Wanita
De Waarheid, 27 Jan 1954, p. 5: correspondent's Jakarta feature ahead of Gerwis's second congress (opening 26 March 1954), describing its literacy courses, hygiene campaigns, defence of women under customary law, wage struggles (Sampurna cigarette factory Surabaya, Kaliklatak coffee estate) with SARBUPRI, and the mass