by Hal Wissel, Ph.D $9.00
by Wajidi Sayadi (Peny.) $6.00
by H. Dahlan Thaib, dkk $7.00
by Abdul Mujib $12.00
by Abdul Mujieb $6.00
by Khalid Muhammad Khalid $9.00
by Prof. Mr. Dr. Sudargo Gautama $6.00