by Stefan Leks $4.00
by Ir. H. Rahmat Rukmana $6.00
by Dr. Sjarkawi, M.Pd $7.00
by Djamaluddin Darwis $7.00
by Heinz Frick & Tri Hesti Mulyani $7.00
by Petra Widmer & Heinz Frick $5.00