First Supplement to James E. Walsh's Catalogue of the Fifteenth-Century Printed Books in the Harvard University Library - Whitesell, David R.

Walsh's pioneering catalogue of the Harvard collection of 15th-century printed books was published in five volumes. The First Supplement describes 202 new incunabula at Harvard: 67 complete or nearly complete copies and 135 single leaves or fragments, representing a total of 173 editions, including 110 not in Walsh's original five volumes.