by Gardner Franklin P; R. Brent Pearce dan Roger L. Mitchell $7.00
by Suhardjo $7.00
by Al. Wahjasudibja, Pr. $12.00
by A. Sandiwanbrata, Pr. $4.00
by Bhisma Murti $7.00
by Dr. Ir. Wisnu Cahyadi, M.Si $6.00