by Baum, Warren C & Stokes M. Tolbert $7.00
by Drs. G. Kartasapoetra $12.00
by Edilius, S.E., dkk $9.00
by Pandji Anoraga, S.E., M.M $13.00
by Drs. Soemarso, S.R $16.00
by Darmadi Durianto, Sugiarto, Tony Sitinjak $7.00
by - $9.00