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Railroads

"Railroads" 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.

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Permanent roads having a line of rails fixed to ties and laid to gage, usually on a leveled or graded ballasted roadbed and providing a track for freight cars, passenger cars, and other rolling stock. Cars are designed to be drawn by locomotives or sometimes propelled by self-contained motors. (From Webster's 3d) The concept includes the organizational and administrative aspects of railroads as well.


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This graph shows the total number of publications written about "Railroads" by people in this website by year, and whether "Railroads" was a major or minor topic of these publications.
Bar chart showing 2 publications over 2 distinct years, with a maximum of 1 publications in 1992 and 2014
To see the data from this visualization as text, click here.