by Drs. Sudarsono, S.H., M.Si $7.00
by Abdul Baqir Zein $11.00
by American Asociation of State Highway and Transportation Officials $9.00
by Agus S. Madjadikara $9.00
by Yusuf al-Uqshari $7.00
by Iremonger, M.J. $6.00