Short De Vrije Pers notice (7 Mar 1952) that International Women's Day would be marked in Surabaya by the Gabungan Organisasi Wanita Surabaya, which includes Gerwis, Perwari, Christian and other women's groups at the regent's pendopo, while Chinese women's organisations held separate events.
Surabaya Post p. 2, 15 February 1957: brief reporting that the Surabaya women's organisation federation formed a committee, chaired by Gerwani, to celebrate International Women's Day, with other left and nationalist women's groups as officers. Evidence of Gerwani's leading role in local women's coalitions.
PhD dissertation in History (UCLA, 2014) by Dahlia Gratia Setiyawan on U.S. anti-communist operations and the 1965-66 purge in Surabaya. Gerwani appears in context: as the PKI's women's affiliate (ch. 1), through the Surabaya women's coalition GOWS in the 27 September 1965 Grahadi demonstration (ch. 4), and in the Army