by Ir. A. G. Kartasapoetra $6.00
by Ir. G. Djatmiko Sudarmo & Ir. S. J. Edy Purnomo $11.00
by I Ngurah Suryawan $12.00
by Wolfgang Bock, SJ. $6.00
by Ir. Dedy Heryadi Sutisna, MS & Ratno Sutarmanto $6.00
by E. Martasudjita, Pr. $4.00
by Ir. Budi Samadi $6.00