by Dr. Ir. Muhammad Rasyaf, MS $6.00
by Soekartawi $5.00
by Drs. Djalinus Syah, dkk $6.00
by Ressang, A.A $6.00
by Drs. S. Margono $9.00
by Drs. Rusyadi $6.00
by Sufi S.Y. $11.00