by Ir. H. Rahmat Rukmana $6.00
by Drs. G. Kartasapoetra $12.00
by $6.00
by Suhardjo & Clara M. Kusharto $7.00
by Thomas Keating $6.00
by Ir. Hatta Sunanta, B.Sc., MS $6.00
by ISEI $11.00