by WK $13.00
by WK $12.00
by Aditama, Tjandra Yoga $5.00
by Ir. Hieronymus Budi Santoso $5.00
by Ir. Heinz Frick & LMF. Purwanto $6.00
by Soekanto, Soerjono $6.00
by Purbowaseso, Bambang $12.00
by Victor Situmorang, S.H $7.00