by $12.00
by C.M. Lingga Purnama, MM. $9.00
by Kartadjoemena, H.S $9.00
by Abbas Salim $9.00
by Amaluddin, Mohamad $6.00
by Drs. Muchdarsyah Sinungan $7.00
by Rosady Ruslan $12.00
by Prof. Dr. dr. H. Dadang Hawari, Psikiater $7.00