"South Dakota" 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.
State bounded on the north by North Dakota, on the east by Minnesota, on the south by Nebraska, and on the west by Montana and Wyoming.
This graph shows the total number of publications written about "South Dakota" by people in this website by year, and whether "South Dakota" was a major or minor topic of these publications.
To see the data from this visualization as text, click here.