by Ir. M. Lies Suprapti $6.00
by Dr. D. F. Walker $7.00
by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk $7.00
by AAK (Aksi Agraris Kanisius) $6.00
by Mgr. P. Van Diepen, OSA. $6.00
by J. Donald Walters $5.00