by Drs. Suwarno $7.00
by Edward G. Reed & Edward K. Gill $16.00
by Dr. Nurdin Muhammad Suin $7.00
by Dr. Lijan Poltak Sinambel, M.M., M.Pd., dkk $9.00
by Drs. B. Suryosubroto $9.00
by Robert P. Masland $7.00