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
Harian Kami, 20 November 1967. KNI report: Sarwo Edhie on crushing the 'PKI Malam' near Lubuk Pakam: 429 PKI and 58 soldiers arrested, planned attacks on ABRI posts, 'some members of Gerwani' involved.
Angkatan Bersendjata, 21 November 1967. 'Operasi Tjakra' in North Sumatra: 215 PKI members arrested for an alleged 'Gerakan 12 Nopember'; Pemuda Rakyat, BTI and Gerwani members at Tanjung Morawa and 'women members of Gerwani' among those arrested.
Angkatan Bersendjata, 5 Desember 1967. Follow-up on 'Operasi Tjakra': 750 arrested in North Sumatra including ex-PKI, PR, Chinese nationals and Gerwani; a Gerwani fugitive from Lubuk Pakam caught on a plantation.