* Yorke, Richard (1969). [https://web.archive.org/web/20071210181240/http://crawdaddy.wolfgangsvault.com/Article.aspx?id=4372 "John Lennon: Ringo's Right, We Can't Tour Again"], ''New Musical Express'', 7 June 1969, reproduced by ''[[Crawdaddy!]]'', 2007.

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