by Dr. Moh. Shochib $9.00
by Prof. Drs. S. Pamudji, M.P.A $11.00
by Wahjosumidjo $13.00
by Prof. Dr. Suharsimi Arikunto $7.00
by Drs. Daryanto $7.00
by Moenaf H. Regar $9.00