by Calvin S. Hall & Gradner Lindzey $12.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $5.00
by Bryan Magee $0.00
by H. Rahmat Rukmana $5.00
by Dr. Paul Suparno, SJ $7.00