Hirano Keiko's Japanese article (2005) on the historical formation of 'ibuism', arguing the supposedly priyayi tradition was produced under colonial rule through the conflict over the 1937 monogamous marriage bill. Context on gender ideology and marriage law; Gerwani marginal.
Japanese review (Ajia Keizai, July 2006) by Hattori Mina of Blackburn's Women and the State in Modern Indonesia, with post-1998 context, chapter summaries and evaluation; Gerwani appears only in notes. Context rather than evidence. (In Japanese.)
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.
Undergraduate article (2017) on the twelfth Kowani congress, Jakarta, 6-9 Feb 1961, arguing it tied the women's movement to government policy under Guided Democracy and sidelined polygamy and literacy issues; notes a Perwari-Gerwani split. Mostly general survey.
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.