by Drs. Abdullah Ali, Drs. Misbandono, dan Ir. Eny Rahma $7.00
by M. Firdaus $7.00
by Drs. Tjahya Supriatna, M.S $9.00
by D.B. Jellife $7.00
by F. Suryatmo $7.00
by Dennis A. Raudinelli $9.00
by Ganefiati Rachmaningsih $7.00