by Haryoto $5.00
by I. Bambang Sugiharto & Agus Rachmat W $11.00
by Prof. Dr. Sri Mulyani E. S $12.00
by Dr. H. Pidyarto Gunawan, O.Carm $4.00
by Ir. Indriyanto $9.00
by Ir. Hatta Sunanta, B.Sc., MS $6.00