Metcalf, Keyes D.2020-07-291952Metcalf, Keyes D. 1952. Dividing library catalogues. Harvard Library Bulletin VI (3), Autumn 1952: 390-393.0017-8136https://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37363608en-USJournal Article2020-07-29