by Ir. Sri Umiyati Sumeru & Dra. Suzy Anna $6.00
by Drs. Aloysius Soenarto & Stanislaus Suliangto $3.00
by Dr. I. Bambang Sugiharto $7.00
by Warisno $6.00
by I. Bambang Sugiharto & Agus Rachmat W $11.00
by Prof. Dr. Loekman Soetrisno $6.00