https://houstonhistorymagazine.org/2010/12/uh-tsu-perpetuating-separate-but-equal/

https://en.wikipedia.org/wiki/One-drop_rule

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

https://www.beaconbroadside.com/broadside/2019/01/before-passing-away-carol-channing-passed-for-white.html

https://www.newyorker.com/magazine/1996/06/17/white-like-me

https://www.thefamouspeople.com/profiles/homer-plessy-31242.php

https://www.vox.com/2014/5/20/5732208/the-green-lantern-theory-of-the-presidency-explained