by Y. Bambang Mulyono $5.00
by Ir. Dedy Heryadi Sutisna, MS & Ratno Sutarmanto $6.00
by H. Rahmat Rukmana $5.00
by Dr. Al. Purwa Hadiwardoyo, MSF. $4.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by Ellen Sue Stern $9.00