Suara Proletar [pseud.]  [microform] : Pembongkaran tiga rahsia penting 

 - Siloengkang :  Poestaka Sofjan,  [n.d.] 
 - 1 microfiche ;  11 X 15 cm. 
<br/><br/> Bahan IDC (Inter Documentation Company)  Modern Indonesia Project : Monographs