"Ephemera" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
Works consisting of transient everyday items, usually printed on paper, that are produced for a specific limited use and then often thrown away. (From Genre Terms: A Thesaurus for Use in Rare Book and Special Collections Cataloguing, 2d ed & The ALA Glossary of Library and Information Science, 1983)
This graph shows the total number of publications written about "Ephemera" by people in Harvard Catalyst Profiles by year, and whether "Ephemera" was a major or minor topic of these publication.
To see the data from this visualization as text, click here.