[REFERENCE -- INCUNABULA]. COPINGER, W.A. Supplement to Hain's Repertorium Bibliographicum. Berlin, 1926. 2 vols. 8o. Original half-vellum (rubbed, smudges). -- BACHAUS, Albert, translator. The Mainz Diary: 1437-1440. Madison, 1940. 8o. Original boards (some rubbing). LIMITED EDITION of 250 copies. -- [ASHLEY, Frederick William]. The Vollbehr Incunabula and the Book of Books. [Washington, 1932]. 2o. Original printed parchment wrappers (rubbed). Slipcase (broken). LIMITED EDITION, number 6 of 420 copies. -- MASSON, Sir Irvine. The Mainz Psalter and Canon Missae 1457-1459. London, 1954. 2o, folding plates. Original quarter-cloth (bowed, rubbed). -- SCHOLDERER, Victor. Fifty Essays in Fifteenth- and Sixteenth-Century Bibliography. Amsterdam, 1966. 2o. Original cloth (bumped at bottom of spine). Dust jacket (rubbed, minor creases). -- And approx. 20 others. Together approx. 26 vols. V.p., v.d., various sizes in original bindings (conditions vary). (25)