by $7.00
by Jazim Hamidi & Budiman N.P.D. Sinaga $7.00
by $6.00
by Prof. Mr. Dr. Sudargo Gautama & Ellyda T. Soetijarto, S.H.. $8.00
by Ir. Kukuh S. Dewobroto, dkk $7.00
by Prof. Dr. H. Zainuddin Ali, M.A. $7.00