by Dr. Ir. Muhammad Rasyaf, MS $7.00
by E. Martasudjita, Pr. J. Kristanto, Pr. $4.00
by Darmono $7.00
by Nursalam $12.00
by Alex Lanur, OFM $6.00
by Aziz Alimul $9.00
by John Kirvan $6.00
by dr. Endang Lanywati $5.00