The Schultze-Rhonhof book is available at Lulu.com by clicking here.
George's other books are available on-line at AAARGH at http://www.vho.org/aaargh/index.html
George tells us: "I have translated a number of articles which are also available at AAARGH. There, for self-protection, I have always avoided using my name and have rather been identified merely as GFH. I have recently asked AAARGH to change GFH everywhere to George F. Held, but they have not yet done so."