I found a verification of the Bradbury quote, in the 15th book of quotations I looked through!

You don't have to burn books to destroy a culture. Just get people to stop reading them." Ray Bradbury, Reader's Digest, 1994

Found in The Times Book of Quotations. 2000. [Glasgow]: Times Books. p. 93

Reader's Digest! Which I don't have easy access to. Maybe you do, Martin?