Merdeka, 10 Apr 1951, p. 2: Antara from Semarang that the Gerwis central board (6 Apr 1951) endorses the 14-party joint programme (annul KMB, independent foreign policy, revoke SOB) and demands a broad national coalition cabinet.
Abadi, 14 April 1951, p. 1: notice that letters and telegrams endorsing the 14-party joint programme poured in, including from the Gerwis central board in Semarang alongside unions and peasant groups.
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, 5 Mar 1952, p. 2: during the cabinet crisis after the Sukiman cabinet fell, the Gerwis central board demands a coalition cabinet of religious, nationalist, socialist and progressive groups.