by Richard G. Lipsey & Peter O. Steiner $18.00
by Dra. Sri Sundari HS., M.Pd $6.00
by - $11.00
by Prof. DR. Koentjaraningrat $9.00
by Drs. Sisdjiatmo Kusumosuwidho, M.Sc $9.00
by Adler, Hans A $6.00