by M. Ghufron H. Kordi K $9.00
by Ir. Abbas Siregar Djarijah $6.00
by Christine A. Adams & Roberts J. Butch $6.00
by Drs. Suwarna Pringgawidagda, M.Pd $18.00
by H. Rahmat Rukmana & Indra Mukti Harahap $5.00
by E. Martasudjita, Pr. $3.00