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Bies Hansen 1988 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentinreader034viewer2022052522552cc9364a7959c37c8b47fbhtml5thumbnails39jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=40Page 40button div class=ts-imageimg data-url=engineering-noise-control-bies-hansen-1988htmlpage=40 data-page=40 class=ts-thumb lazyload alt=Page 40: Engineering Noise Control - Bies Hansen 1988 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentinreader034viewer2022052522552cc9364a7959c37c8b47fbhtml5thumbnails40jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=41Page 41button div class=ts-imageimg data-url=engineering-noise-control-bies-hansen-1988htmlpage=41 data-page=41 class=ts-thumb lazyload alt=Page 41: Engineering Noise Control - 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Bies Hansen 1988 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentinreader034viewer2022052522552cc9364a7959c37c8b47fbhtml5thumbnails419jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=420Page 420button div class=ts-imageimg data-url=engineering-noise-control-bies-hansen-1988htmlpage=420 data-page=420 class=ts-thumb lazyload alt=Page 420: Engineering Noise Control - Bies Hansen 1988 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentinreader034viewer2022052522552cc9364a7959c37c8b47fbhtml5thumbnails420jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=421Page 421button div class=ts-imageimg data-url=engineering-noise-control-bies-hansen-1988htmlpage=421 data-page=421 class=ts-thumb lazyload alt=Page 421: Engineering Noise Control - 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