by Drs. R. Suharno $6.00
by A.H. Manurung, S.E $6.00
by Prof. Dr. Suharsimi Arikunto, dkk $7.00
by Santoso, Slamet Iman $7.00
by Drs. H. Kahar Masyhur $16.00
by Drs. H. Burhanuddin Salam, M.M $7.00