by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by H. Rahmat Rukmana $6.00
by Drs. Abas Kartadinata $7.00
by Dr. John Wong $9.00
by H. Rahmat Rukmana $5.00
by Moenaf H. Regar $9.00