by Gunawan Widjaja & Kartini Mulyadi $7.00
by Gunawan Widjaja, A. Yani $7.00
by $6.00
by Prof. Mr. Roeslan Saleh $5.00
by - $9.00
by Prof. Mr. Dr. Sudargo Gautama $8.00
by Dr. H. Budi Untung, S. H., C. N., M. M. $9.00