div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5page1jpg target=_blank img data-url=comparison-of-fission-product-and-beryllium-7-concentrations-in-the-atmospherehtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Comparison of Fission Product and Beryllium-7 Concentrations in the Atmosphere loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5thumbnails1jpg width=140 height=200 adivp© 1960 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5page2jpg target=_blank img data-url=comparison-of-fission-product-and-beryllium-7-concentrations-in-the-atmospherehtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Comparison of Fission Product and Beryllium-7 Concentrations in the Atmosphere loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5thumbnails2jpg width=140 height=200 adivp© 1960 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5page3jpg target=_blank img data-url=comparison-of-fission-product-and-beryllium-7-concentrations-in-the-atmospherehtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: Comparison of Fission Product and Beryllium-7 Concentrations in the Atmosphere loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5thumbnails3jpg width=140 height=200 adivp© 1960 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imagea href=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5page4jpg target=_blank img data-url=comparison-of-fission-product-and-beryllium-7-concentrations-in-the-atmospherehtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: Comparison of Fission Product and Beryllium-7 Concentrations in the Atmosphere loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader040vdocumentinreader040viewer2022020522575068161a28ab0f07ae8adahtml5thumbnails4jpg width=140 height=200 adivp© 1960 Nature Publishing Grouppdiv