by Ir. Sutaman $6.00
by Prof. dr. Arjatmo tj., dr. boenyamin S $5.00
by N. Edy Soetanto, BE. $5.00
by $4.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by AAK (Aksi Agraris Kanisius) $6.00