De Locomotief, 14 Aug 1950 (Aneta): about 5,000 attend a Medan peace-committee rally, mainly plantation, peasant and pedicab unions, with anti-American banners. Speakers include Tuti Rukmi for 'Indonesian women'. The resolution urges Indonesia not to join the 'imperialist war' in Korea and calls for a ban on atomic wea
Het Nieuwsblad voor Sumatra (10 Mar 1954, p.2): in Binjai two committees were formed to organise May Day. The first unites SOBSI, Sarbupri, Gerwis, Pemuda Rakjat and similar groups under a SOBSI chair; the second comprises non-SOBSI organisations such as PGRI and Perbupri and regards itself a branch of the Medan commit
Java-Bode, 18 March 1954, p. 2: short item on two rival committees for 1 May Labour Day in Binjai, East Sumatra: one uniting Sobsi, Sarbupri, Gerwis, Pemuda Rakjat and similar bodies, chaired by Sobsi, and a non-Sobsi committee of PPPRI, OBPI, Perbupri and PGRI.
PhD dissertation (Yale, 1967) by R. William Liddle, a political-science study of local parties and political integration in Simalungun regency and Pematangsiantar, North Sumatra, based on 1963-64 fieldwork. Gerwani appears in a few brief passages in ch. VI: listed among PKI mass organizations (p. 190), given no members