by Dr. Ir. Muhammad Rasyaf, MS $9.00
by AM. Syahrur $13.00
by William Montgomery Watt $6.00
by Suharso, A.S.P $6.00
by Ir. Setijo Pitojo $6.00
by M. Ismail Yusanto, M. Karebet Widjayakusuma $9.00