by Drs. Daryanto $6.00
by Kartadjoemena, H.S $7.00
by Drs. H.M. Yacob Ibrahim $11.00
by Prof. Dr. S. Nasution, M.A. $9.00
by Dr. Henry Cloud $11.00
by Bruce J. Cohen $13.00
by Andree Feilard $11.00
by Ir. Bambang Cahyono $7.00
by A. Lukasik, SCI. $4.00
by Musthafa Abd. Rahman $9.00
by Liliek S. Sundoko $6.00
by - $6.00