Ehrlich, Evelyn Seltzer2020-06-031950Ehrlich, Evelyn Seltzer. 1950. Photomicrography as a bibliographical tool. Harvard Library Bulletin IV (1), Winter 1950: 123-126.0017-8136http://nrs.harvard.edu/urn-3:HUL.InstRepos:42669219en-USJournal Article2020-06-03