by Drs. G. Kartasapoetra
$7.00

by J. Darminta, SJ
$3.00

by Ir. M. Lies Suprapti
$7.00

by H. Rahmat Rukmana & Indra Mukti Harahap
$5.00

by Dr. Gunarto Suhardi, SH
$9.00

by Ir. Hatta Sunanta, B.Sc., MS
$6.00