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CHITOKU** I 11 Cho 1990a0 1990b HMG-371 11 1991f¥3fi11El Institute of Earth Science loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentinreader033viewer20220419005e601f1154a4e843ed7a99b0html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=geologic-age-of-the-mosasaurian-fossil-from-hobetsua-hokkaido-japan-norio-k-itohtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: Geologic age of the mosasaurian fossil from Hobetsu— Hokkaido Japan Norio K ITO* and Tsutomu CHITOKU** I 11 Cho 1990a0 1990b HMG-371 11 1991f¥3fi11El Institute of Earth Science loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentinreader033viewer20220419005e601f1154a4e843ed7a99b0html5thumbnails3jpg 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Norio K ITO* and Tsutomu CHITOKU** I 11 Cho 1990a0 1990b HMG-371 11 1991f¥3fi11El Institute of Earth Science loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader033vdocumentinreader033viewer20220419005e601f1154a4e843ed7a99b0html5thumbnails5jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=6Page 6button div class=ts-imageimg data-url=geologic-age-of-the-mosasaurian-fossil-from-hobetsua-hokkaido-japan-norio-k-itohtmlpage=6 data-page=6 class=ts-thumb lazyload alt=Page 6: Geologic age of the mosasaurian fossil from Hobetsu— Hokkaido Japan Norio K ITO* and Tsutomu CHITOKU** I 11 Cho 1990a0 1990b HMG-371 11 1991f¥3fi11El Institute of Earth Science loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC 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