by Drs. Djalinus Syah, Dra. H.N. Murdiati Sulastomo, dan Dra. H. Azimar Enong
$9.00

by Prof. Dr. Oemar Hamalik
$7.00

by Syahrin Harahap
$9.00

by George W. Barclay
$7.00

by Pandji Anoraga, S.E., M.M dan H. Djoko Sudantoko, S.Sos., M.M
$13.00

by Drs. O.P. Simorangkir
$9.00