by Erick Reidenbach $9.00
by Dr. Ir. Akhmad Fauzi, M.Sc. & Dr. Dra. Suzy Anna, M.Si $12.00
by Drs. A.W. Widjaja $6.00
by $9.00
by Dra. Nurul Zuriah, M.Si $11.00
by William J. Goode $9.00