Merdeka, 6 April 1951: Batik Workers' Union conference
Merdeka, 6 Apr 1951, p. 2: Serikat Buruh Batik conference on fusion with the textile union; Gerwis listed among the guests and those who gave greetings, with SOBSI and MPs Werdojo and Pardede.
Merdeka, 25 April 1951: May Day 1951 preparations
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.
Merdeka, 8 August 1951: Peace Committee organisations form 17 August committee
Merdeka, 8 Agustus 1951 (hlm. 2): mass organisations under the Peace Committee form their own 17 August committee with a 'peace programme', Gerwis and Lekra running the programme section.