by Dr. Ir. Muhammad Rasyaf, MS $9.00
by Ir. Hieronymus Budi Santoso $5.00
by Dr. E.G. Brahmaputra Marjadi, M.P.H $7.00
by Ir. M. Lies Suprapti $7.00
by Toelihere, Mozes $6.00
by Howard Clinebell $13.00