by Kasiyanto Kasemin $7.00
by Ir. Doli Siregar, M.Sc., FRICS., SVC $11.00
by Sudarwan Danim $7.00
by Edilius, S.E dan Drs. Sudarsono, S.H., M.Si $9.00
by Istijanto $9.00
by Istijanto M.M $12.00