1971/11: Twins of Evil 1971

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https://dai.ly/x9g6swu 

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

https://www.moriareviews.com/horror/twins-of-evil-1971.htm 

https://eofftvreview.wordpress.com/2021/02/10/twins-of-evil-1971/ 

http://1000misspenthours.com/reviews/reviewsn-z/twinsofevil.htm