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ANSIASTM D5634—01 Permanence of Paper To the memory of Cai Wenmei and wang Wen whose Protests loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsmxreader034viewer20220505085f9964915a179d67e52fa394html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=susan-greenhalgh-ecobook-50-is-acid-free-and-meets-the-minimum-requirements-of-ansiastmhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: Susan Greenhalgh · EcoBook 50 is acid-free and meets the minimum requirements of ANSIASTM D5634—01 Permanence of Paper To the memory of Cai Wenmei and wang Wen whose Protests loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC 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Protests loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsmxreader034viewer20220505085f9964915a179d67e52fa394html5thumbnails6jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=7Page 7button div class=ts-imageimg data-url=susan-greenhalgh-ecobook-50-is-acid-free-and-meets-the-minimum-requirements-of-ansiastmhtmlpage=7 data-page=7 class=ts-thumb lazyload alt=Page 7: Susan Greenhalgh · EcoBook 50 is acid-free and meets the minimum requirements of ANSIASTM D5634—01 Permanence of Paper To the memory of Cai Wenmei and wang Wen whose Protests loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsmxreader034viewer20220505085f9964915a179d67e52fa394html5thumbnails7jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage 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