by Abdul Aziz asy-Syinnawi $6.00
by Sumarti M. Thahir $5.00
by Ir. H. Rahmat Rukmana - Hj. Yuyun Yuniarsih, BSc. $5.00
by - $11.00
by Paul J. Wharton $4.00
by Prof. Dr. Ahmad Shalaby $7.00