This image is a derivative work of the following images: File:The_Art_of_Bookbinding,_Zaehnsdorf,_1890.djvu licensed with PD-1923 2011-02-22T16:17:36Z...
of this file: Art of Bookbinding p039 Martini's Folding Machine.png Art of Bookbinding p040 decoration.png Art of Bookbinding p041 Beating Hammer.png...