by Ir. Ari Wijayani Purwanto $11.00
by Enceng Surachman & Widodo Agus S. $6.00
by AAK (Aksi Agraris Kanisius) $6.00
by Dr. Emmanuel Subangun $4.00
by Ir. Lisdiana Fachruddin $5.00
by H. Rahmat Rukmana $5.00
by Ir. Setijo Pitojo $6.00
by - $6.00
by Siti Muslikhati $6.00
by Calvin S. Hall & Gradner Lindzey $11.00
by $7.00
by Fadjar Pratikto $7.00