Berita Yudha, 29 Oktober 1965. Kodam Bukit Barisan report 'Digerebeg di Siantar' claims a Gerwani woman 'trained at Lubang Buaya' was found in a raid in Pematang Siantar, repeating eye-gouging claims.
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