by AS Rosyid $16.00
by Baum, Warren C & Stokes M. Tolbert $7.00
by Jo Condrill & Bennie B., Ph.D $7.00
by Drs. Djalinus Syah., dkk $11.00
by Sadono Sukirno $12.00
by Dr. Ir. Hermawan Thaheer $11.00