by Dr. Soekartawi $6.00
by Aloys Budi Purnomo, Pr. $4.00
by Ir. M. Lies Suprapti $6.00
by Lisa O. Engelhardt $6.00
by Ir. H. Rahmat Rukmana & Yuyun Y $6.00
by D. Soetrisno, S.H $9.00