Cocaine vs Heroin

https://www.vox.com/2014/9/25/6842187/drug-schedule-list-marijuana

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

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

https://www.projectknow.com/15-famous-heroin-addicts-and-why-they-used/

https://www.recovery.org/topics/famous-cocaine-addicts/

https://www.theguardian.com/film/2015/nov/03/robin-williams-disintegrating-before-suicide-widow-says

https://heroin.net/types-of-heroin/by-area-of-origin/

https://www.therecoveryvillage.com/heroin-addiction/where-does-heroin-come-from/#gref

https://drugabuse.com/library/the-effects-of-cocaine-use/

https://www.drugfreeworld.org/drugfacts/heroin.html

http://www.bbc.co.uk/newsbeat/article/30225186/white-heroin-can-be-confused-easily-for-other-drugs-like-cocaine

https://www.businessinsider.com/cocaine-facts-2011-12

https://www.verywellmind.com/what-does-cocaine-high-feel-like-21988

https://www.businessinsider.com/how-much-does-cocaine-cost-in-the-us-2016-10

https://heroin.net/about/how-much-does-heroin-cost/

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

https://www.recovery.org/topics/how-heroin-is-made/