by Suharso, A.S.P $6.00
by Ir. H. Muhammad Syakir Sula, AAIJ, FIIS $31.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00
by J. Waskito, SJ. $4.00
by DR. A. Saleh Abdullah $9.00
by Ir. Bambang Cahyono $6.00