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 item (7 Aug 1956): railway union SBKA strike in Jember halted two goods trains; the local Gerwani branch voluntarily supplied food to the strikers, and railway management's attempt to register absentees was withdrawn after worker reaction. An example of Gerwani solidarity with labour.
Java-Bode, 7 August 1956, p. 2: report on a railway workers' (SBKA) strike at Jember that stopped two goods trains. The Jember branch of Gerwani voluntarily supplied the strikers with food; management's attempt to register absentees was withdrawn after worker reaction, and there was no disorder.