by $4.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by James McManus, CSsR, STL. $3.00
by Drs. D. Hendropuspito, O. C. $7.00
by Ir. Eddy Afrianto & Ir. Evi Liviawaty $6.00
by Philip Etienne R. $3.00