Mixed lot of 3 historical reference works on graphic art, SINGER, MASSMANN and others,

Collection of 3 historical reference works on graphic art, SINGER, MASSMANN and others, 1.) Hans W. Singer, Handbuch für Kupferstichsammler, with 11 original prints, 3rd edition, Leipzig: Karl W. Hiersemann 1923; 2.) Der Totentanz, forty woodcuts by Hans Holbein the Younger, Facsimile of the first edition, Berlin: Fischer & Franke 1907; 3.) H. F. Massmann, Die Baseler Todtentänze, nebst geschichtlicher Untersuchung..., Stuttgart: J. Scheible 1847, with tables and overviews. Each with signs of age and wear, some browning and spotting, the volume Baseler Todtentänze heavily used with supplemented softcover binding.