by Dr. Ir. Muhammad Rasyaf, MS $11.00
by M. Tohar $7.00
by Afandhie Rosmarkam & Nasih Widya Yuwono $9.00
by Ir. M. Lies Suprapti $6.00
by Sunarto Kusdiarjo $5.00
by AAK (Aksi Agraris Kanisius) $6.00