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, 15 July 1952 (Sin Po): a Jakarta meeting of 34 parties and organisations forms a Freedom Day (17 August) committee led by the PKI's Greater Jakarta section by 26 votes; PNI, Parkindo, SOBSI and Gerwis sit on it, Masjumi and PSI abstain. It adopts the National Reveil joint declaration signed by 60 groups.
De Nieuwsgier, 18 Dec 1953: three Jakarta branches of the PSI protest to Mayor Sudiro that election committees for the Greater Jakarta regencies seat only certain parties and their 'side organisations', naming Gerwis, Wanita Demokrat, Petani, Sobri, Sobsi and PPR as associations with seats. Shows the political contest
Java-Bode, 18 December 1953, p. 2: the PSI's Jakarta Raya branches complain to Mayor Sudiro that the election committees for the 1955 elections are unrepresentative. The PSI coordinator names Gerwis, Wanita Demokrat, Petani, Sobri, Sobsi and PPR among the associations holding seats, calling them auxiliaries of parties.
Indische Courant voor Nederland, 23 Dec 1953, p. 2: PSI branches complain to Jakarta mayor Sudiro that election committees in Jakarta Raya are unrepresentative, dominated by party affiliates; the PSI coordinator names Gerwis, Wanita Demokrat, Sobsi, PPR and others among bodies holding seats.