by Archie J. Bahm $7.00
by Ir. Ari Wijayani Purwanto $0.00
by Ir. L. Widarto & FX. Sudarto C. Ph $5.00
by MUSTHAFA MAHMUD $8.00
by Dr. Al. Purwa Hadiwardoyo, MSF. $3.00
by AAK (Aksi Agraris Kanisius) $5.00