Mursidah's 2012 survey of Indonesian women's organisations as a 'feminist movement', from Kartini to the New Order and left activism today; about two pages on Gerwani. Thin general overview.
Ipong Jazimah's 2016 biographical sketch of S.K. Trimurti (1912-2008): journalist, labour minister, Gerwis co-founder, Petisi 50 signatory. Pages 50-51 cover Gerwis's founding; relies on a few secondary sources.
Part I of Ita Fatia Nadia's essay (südostasien 3/2020) tracing the women's movement 1912-65 to Gerwani: peasant and plantation work, marriage and land reform, WIDF ties and 1.7 million members. Notes Kowani in the WIDF 1946-49 and Indonesian women at the WIDF secretariat. In German.