Solidariteit met vrouwen in Nederland
Solidarity with women in the Netherlands: Umi Sardjono on NVB invitation
De Waarheid, 10 Mar 1954, p. 5: excerpt from Umi (Sardjono) describing how the NVB received Gerwis's invitation to its congress with joy, sending a delegation and running a friendship campaign and a soap-selling drive (soap printed with Dutch and Indonesian hands) to strengthen solidarity and support Indonesia's demand