div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=latin-american-course-in-sao-paulo-on-radioisotope-methodologyhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Latin-American Course in São Paulo on Radioisotope Methodology loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader036vdocumentssitereader036viewer2022080320575067fe1a28ab0f07ae1950html5thumbnails1jpg width=140 height=200 divp© 1953 Nature Publishing Grouppdiv