# Atlas of Historical County Boundaries

> database that maps changes in the boundaries, names, and organization of U.S. counties

**Wikidata**: [Q99916079](https://www.wikidata.org/wiki/Q99916079)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Atlas_of_Historical_County_Boundaries)  
**Source**: https://4ort.xyz/entity/atlas-of-historical-county-boundaries


## References

1. [Library of Congress Online Catalog](https://lccn.loc.gov/2018487899)
2. WorldCat
3. Classify
4. [Source](https://digital.newberry.org/ahcb/downloads/)
5. [Source](https://publications.newberry.org/ahcb/about/)
6. [Library of Congress Linked Data Service](https://id.loc.gov/resources/works/20903628.html)
7. [Library of Congress Linked Data Service](https://id.loc.gov/resources/instances/20903628.html)
8. Virtual International Authority File
9. Library of Congress Name Authority File
10. [National Endowment for the Humanities](https://apps.neh.gov/publicquery/AwardDetail.aspx?gn=PA-23147-98)
11. [Inter-university Consortium for Political and Social Research. 2006](https://www.icpsr.umich.edu/web/ICPSR/studies/9025)
12. YouTube API