1968/8: Destroy All Monsters 1968

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

https://www.moriareviews.com/sciencefiction/destroy-all-monsters-1968.htm 

https://eofftvreview.wordpress.com/2019/06/01/kaiju-soshingeki-1968/

http://www.1000misspenthours.com/reviews/reviewse-g/destroyallmonsters.htm