by Ir. Arifin Arief, M. P $5.00
by Drs. Wisnubroto Widarso $5.00
by Miller, Mary Susan, Ph.D $0.00
by J. Donald Walters $5.00
by P. Moses H. Beding, CSsR. $3.00
by Bambang Agus Murtidjo $6.00