by AA Navis $11.00
by Susmayati, B.A., dkk $11.00
by Dr. Herman J. Waluyo $9.00
by Gwen Pemberton $7.00
by FLP Pusat $6.00
by Anjar $7.00
by O. Solihin $7.00
by Tuti Soenardi $7.00
by Ir. Endar Sugiarto, B.A $6.00
by Hardjana, HP $7.00