https://en.wikipedia.org/wiki/Key_events_of_the_20th_century#The_Russian_Revolution_and_Communism
Footnote 19: https://scholarworks.gvsu.edu/cgi/viewcontent.cgi?article=1169&context=honorsprojects
The whole section of the Wiki article is regurgitated bad history, but citing a literal rando is low even for Wikipedia
One of the weaknesses of Wikipedia's model is sources aren't weighted. It's either cited or uncited, and Cochrane reviews don't look better than web citations.