Packard, Frederick C.2020-06-151949Packard, Frederick C. 1949. The Harvard Vocarium discs. Harvard Library Bulletin III (3), Autumn 1949: 441-445.0017-8136http://nrs.harvard.edu/urn-3:HUL.InstRepos:42672672en-USThe Harvard Vocarium discsJournal Article2020-06-15