by Dr. Al. Purwa Hadiwardoyo, MSF. $4.00
by Robert H. Thouless $7.00
by Iskandar Kanna, A.Md $6.00
by Dr. Ir. Muhammad Rasyaf, MS $6.00
by Dr. Khalid Abu Syadi $5.00
by I Ngurah Suryawan $12.00
by $7.00