by Blau, Peter M. & Marshall W. Meyer $6.00
by - $13.00
by ISEI $12.00
by Prof. Dr. Sondang P. Siagian, M.P.A $7.00
by Pindi Kisata, S. Kom $6.00
by Frans M. Royan $11.00
by Y. I. Iswarahadi, SJ. $4.00