Jan,
No problem.
The official titel of the book is 'Moderne Gewehrfabrikation' by Otto Maretsch. Published in 1913 by Verlag von Bernh. Friedr. Voigt in Leipzig.
It also has some pretty rare, although not very nicely printed, photographs of rifle manufacturing and assembly at Fabrique Nationale, Mauser and DWM.
If you want, I can get you a digital copy of the book, as I have scanned and recognized (OCR) the book as it's pretty fragile and I tend to handle it as little as possible.
The original cover:
Steel forging at DWM, around 1910 - 1913:
