by Hoogendoom, J. $6.00
by KH. Moh. Amin Suma $7.00
by Zulkarimein Nasution $9.00
by Swasono, Sri-Edi $7.00
by Dr. Sofyan Syafri Harahap, M.S,Ac $12.00
by $11.00
by Hilman Hariwijaya & Boim Lebon $6.00