by Dr. Abdurrahman Umairah $9.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00
by Ir. Bambang Cahyono $7.00
by A.M. Mangunhardjana, SJ $6.00
by Cynthia Whitham $9.00
by Drs. Agus Sujanto, dkk $7.00