by Pradjarta Dirdjosanjoto $6.00
by Ir. Hieronymus Budi Santoso $5.00
by Ir. Budi Samadi & Ir. Bambang Cahyono $7.00
by Ir. Bambang Cahyono $7.00
by Drs. Thohir Luth, M.A., dkk $6.00
by Noer Iskandar Al Barsany $6.00