https://en.wikipedia.org/wiki/Federal_lands#/media/File:Map_of_all_U.S._Federal_Land.jpg

https://en.wikipedia.org/wiki/Federal_lands

http://www.core77.com/reactor/undesigningamerica.asp

https://www.jstor.org/stable/988090

https://www.acsa-arch.org/proceedings/Annual%20Meeting%20Proceedings/ACSA.AM.106/ACSA.AM.106.17.pdf