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Are you Colin Hansen, author of the books below?
Engineering Noise Control by Colin Hansen Noise Control by Colin Hansen Noise Control by Colin Hansen I Do Butt Stuff by Colin Hansen I Do Butt Stuff by Colin Hansen I Do Butt Stuff by Colin Hansen I Do Butt Stuff by Colin Hansen I Do Butt Stuff by Colin Hansen I Do Butt Stuff by Colin Hansen I Do Butt Stuff by Colin Hansen


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