by Drs. Daryanto $7.00
by dr. Boyke Dian Nugraha $9.00
by Drs. Abdullah Ali, Drs. Misbandono, dan Ir. Eny Rahma $7.00
by Dr. B. Siswanto Sastrohadiwiryo $12.00
by Michael P. Todaro $18.00
by Toemin, A. Masoem $5.00