by Ir. Bambang Cahyono $6.00
by Edy Soatanto, N, BE $5.00
by Dr. C. Groenen, OFM. $9.00
by Drs. Al. Amin Susanto $4.00
by H. Rahmat Rukmana $6.00
by Ir. H. Rahmat Rukmana $6.00