by Ir. R. Bambang Soelarso $6.00
by Prof. DR. H. Abdul Muis Ba'dulu & Hermann, S.Ag., M.Pd $7.00
by Prof. Drs. H.A.W. Widjaja $6.00
by Sutarni M. Soerjowinoto $6.00
by Eko Budi Kuncoro $13.00
by Prof. Dr. Soegyarto Mangkuatmodjo $13.00
by Ir. Setijo Pitojo $6.00
by Ir. Joko Mulyanto $0.00
by - $6.00
by Calvin S. Hall & Gradner Lindzey $11.00
by $7.00
by Fadjar Pratikto $7.00