by H. Rahmat Rukmana $5.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $7.00
by Dr. Al. Purwa Hadiwardoyo, MSF. $4.00
by PIKA $5.00
by Drs. H. Kahar Masyhur $16.00
by Edgar Morin $6.00