by Drs. Agus M. Hardjana, M.Sc., Ed $6.00
by Agus S. Gunadi $9.00
by Agus S. Gunadi $7.00
by Drs. G. Kartasapoetra $7.00
by AAK (Aksi Agraris Kanisius) $5.00
by Ellen Sue Stern $9.00
by Ir. Loekas Soesanto, M.S., Ph.D $11.00