"Postcards as Topic" 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 about cards on which a message may be written or printed for mailing without an envelope. Art & Architectural Thesaurus Online www.getty.edu/research/conducting_research/vocabularies/aat/ accessed 12/18/2008
Below are MeSH descriptors whose meaning is more general than "Postcards as Topic".
Below are MeSH descriptors whose meaning is more specific than "Postcards as Topic".
This graph shows the total number of publications written about "Postcards as Topic" by people in this website by year, and whether "Postcards as Topic" was a major or minor topic of these publications.
To see the data from this visualization as text, click here.