Roeke, Julius Herman,  1884- <br/><br/>
Alasan dan maksud aturan tentang perkumpulan koperasi  [microform] / 
Julius Herman Roeke. 
 - [Indonesia :  s.n.,  n.d.] 
 - 2 microfiches :  positive ;  11 X 15 cm. 
<br/><br/> Bahan IDC (Inter Documentation Company)  Modern Indonesia Project : Monographs