Currently in progress is a publication in four volumes about standard gauge 050 tank locomotives, which carries the title "Schwere Brocken" (Heavy Hunks). The second volume was published in January 2016 in the "Herdam Verlag".
The official presentation happened on March 4th at the Zeche Zollern:
As complement to the printed version, the interested reader can find below some additional compilations. These represent the current status while being regularily supplemented:
For people interested in this subject we provide three different excerpts from the book for download:
The book can be ordered in all (German) book shops - especially at the shops specialised on railway literature:
But the book is also available "online", e.g. at: