by Dr. Endang Turmudi $9.00
by Chris Anderson $13.00
by C.M. Lingga Purnama, MM. $9.00
by Sei H. Dt. Tombak Alam $6.00
by Salah Wahab $9.00
by Drs. Ec. Alex. S. Nitisemito dan Drs. M. Umar Burham. M.S $6.00