detikNews feature (2013) on Gerwis's founding on 4 June 1950 by six organisations (Rupindo, Persatuan Wanita Sedar, Istri Sedar, Gerwindo, Wanita Madura, PPRI) and founders Trimurti, Salawati Daud, Umi Sardjono, Tris Metty and Sri Panggihan, with I.G.A.A. Ratih. Concise account of origins.
Tempo biographical feature (2 Oct 2021, Isma Savitri and Nurdin Kalim) on Umi Sardjono's early life: born Suharti Sumodiwirjo in Salatiga, 24 Dec 1923, inspired by Kartini, joined Parindra then Gerindo, worked as an underground courier in East Java, tortured by the Japanese in 1943 alongside S.K. Trimurti, married Suki
Indonesian Wikipedia article (retrieved 13 Oct 2026) with a short institutional history of Gerwani: founding 4 June 1950 from six regional organisations, Tris Metty as first chair, membership growth to 3 million in 1965, PKI influence and dissolution on 12 March 1966. Encyclopedic summary.