unable to locate URL; available in print via Libraries Australia/.biball-r20-20051130, LCN: 97176193  lv 30/9/9. Found the matched article in German National Lib and book title from Google and other library but no contents available to check so not sure if it the right book. hd 7/11/13  verified via contents see related URL, changed to book section Lyn 23/1/14