by Ir. Yushinta Fujaya, M.Si $7.00
by Sei H. Dt. Tombak Alam $6.00
by Sagimun MD $12.00
by Drs. Marcel Go, M.S $7.00
by A. Tresna Sastrawijaya, M.Sc $9.00
by Dr. C. Asri Budiningsih $7.00