Looking for original German text

Greetings, all!

Over the past two-three years I've been looking for the original rules in German, and even went so far as to contact Bill Leeson, but I was only told that the text is available in the British Library.

No US library collection apparently has it, and I even contacted a German military archive for information, but they told me they did not have it.

Does anyone know where I may locate the terribly elusive, original German text for von Reisswitz's Kriegsspiel?

Thanks in advance.

HERE is a copy of the original book