by Drs. B. Suryosubroto $9.00
by N. John Myer $12.00
by Prof. Dr. Soekidjo Notoatmodjo $11.00
by Drs. Abdul Chaer $7.00
by Prof. Dr. H. Abdurrahmat Fathoni, M.Si $7.00
by Prof. DR. S.P. Siagian, M.P.A $9.00