by Ir. AG. Kartasapoetra $9.00
by $7.00
by Ir. Heinz Frick & Ch. Koesmartadi $6.00
by Harry Simons $13.00
by $20.00
by Tanenbaum $13.00
by Drs. Daryanto $7.00
by Aziz Alimul $9.00
by Hilman Hariwijaya & Boim Lebon $6.00
by Prof. Dr. Soemarmo Markam $6.00