by Ibnu Basyar $5.00
by Drs. Hg. Suseno Triyanto Widodo $6.00
by J. Darminta, SJ $3.00
by Ir. M. Lies Suprapti $7.00
by Ali Harb $11.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00