by Ir. Abbas Siregar Djarijah $5.00
by Cik Hasan Bisri $9.00
by Rachmanto $6.00
by Djamaluddin Darwis $7.00
by Syahrin Harahap $9.00
by Ir. Suyatno Risza $9.00
by Prof. Drs. H. A. W. Widjaja $6.00
by Drs. Djalinus Syah., dkk $13.00
by Eng Antonio Augusta Borelli Machado $3.00
by Prof. Adolf Lippi, CP $4.00
by Novia Syahidah $6.00