Hi jogil,
I could not get your link to work but I looked at the page source and was able to figure it out. Your link shows an earlier booklet on
Amazon by Hans Reiche from about 1961. I have this one. It was fine for its time but is greatly surpassed by the more recent book co-written with Mike Sendbuehler. The newer book is significantly expanded, better illustrated, and includes a numbering system for identifying the varieties.
I want it! If somebody else has any advice on how to find one, please let me know.