by Stefanus Osa Triyatna $4.00
by J. Heinrich Arnold $8.00
by Bambang Agus Murtidjo $6.00
by Drs. Ig. Wursanto $7.00
by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00
by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk $7.00