by Waluyadi, SH. $6.00
by Prof. DR. A.P. Parlindungan, SH. $8.00
by Eddy Tano, Dipl. Chem. Eng. $7.00
by Amiruddin Hamzah, SH. $6.00
by Kansil C.S.T $11.00
by Lilik Mulyadi, S.H. $7.00