by Soekartawi $7.00
by Ir. Ibnu Dwi Buwono, M.Si $7.00
by J. Darminta, SJ $3.00
by Ir. Nur Tjahjadi $5.00
by Drs. Yustinus Semiun, OFM $22.00
by Thomas Hidya Tjaya $6.00