by Drs. Ary H. Gunawan $11.00
by John W. Osbome $7.00
by Drs. Jumingan, S.E., M.M., M.Si $11.00
by D.B. Jellife $7.00
by Keneth Tolt $6.00
by Drs. Daryanto $7.00
by Dr. Moh. Efendi, M.Pd., M.Kes $7.00
by Rafael Raga Maran $9.00