by Soekartawi
$7.00

by Prof. Dr. H. Jalaluddin
$11.00

by Iskandar Kanna, A.Md
$7.00

by Ir. Dede Juanda J.S. & Ir. Bambang Cahyono
$6.00

by E. Jaspan Kusuma
$6.00

by H. Rahmat Rukmana & Indra Mukti Harahap
$5.00