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
Mitsuo Nakamura's 1976 Cornell PhD thesis, an ethnography and local history of the Muhammadiyah reform movement in Kotagede, Yogyakarta, arguing that Islamization of Java is an ongoing, internally generated process. Gerwani appears only in passing (p. 208), listed with Pemuda Rakyat and Lekra as PKI-influenced mass org
Iwan Gardono Sudjatmiko's 1992 Harvard sociology PhD thesis compares East Java and Bali to explain the PKI's destruction after 1965, arguing that it followed from the party's 1963 revolutionary strategy and that violence depended on public figures, army units and PKI size. It covers mobilisation, land reform and local
Pohlman's 2014 article arguing the 1965-68 killings were political genocide and that the military's post-coup propaganda, including fabricated stories, constituted incitement to genocide; critiques the exclusion of political groups from the Genocide Convention.