by N. Edy Soetanto, BE. $5.00
by J. Heinrich Arnold $8.00
by ISEI $18.00
by Ir. Abbas Siregar Djarijah $5.00
by Ir. Suprio Guntoro $6.00
by Dennis & Matt Linn $4.00
by Ir. Sarjoni Basri $7.00
by Hayatinufus A.L. Tobing $9.00
by Adolf Heuken $18.00
by Joseph J. Sullivan & Hadi Podo $13.00
by Ir. H. Nazarukhan Yasin $18.00
by - $11.00