by Komlit KWI $3.00
by Hardi Soenanto $9.00
by Joos van Vugt $7.00
by Koentjaraningrat $6.00
by Ir. Sri Umiyati Sumeru & Dra. Suzy Anna $6.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00