CIA study, May 1955: The Communist Party of Indonesia - a survey of PKI organization and history
CIA study, May 1955, surveying PKI organisation and history before the 1955 elections, with a short section on Gerwani among eight front organisations (pp. 49-50) and PKI foreign channels. Earliest extended US assessment of Gerwani as a PKI front.
US National Intelligence Estimate 55-64, 22 July 1964: Prospects for Indonesia
US National Intelligence Estimate 55-64, 22 July 1964, on Indonesia's prospects: Sukarno dominant, PKI strengthened, Konfrontasi driving a left drift. Mentions Gerwani only among PKI fronts (p. 5); context for pre-1965 US views.
CIA special report, 23 October 1964: Sukarno and the Communists
CIA Special Report, 23 October 1964, on the Sukarno-PKI relationship; lists Gerwani among PKI fronts with almost two million claimed members. Pre-coup US context.