by $4.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by Prof. Dr. dr. Sarwono Waspadji, Kartini Sukardji $6.00
by Prof. Dr. Nur Nasry Noor, M.P.H $6.00
by Ir. H. Rahmat Rukmana & Yuyun Y $6.00
by V. Indra Sanjaya, Pr. $4.00