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Scientific American 1915-01-30
1261 visits
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Scientific American 1915-05-22
1485 visits
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Scientific American 1915-05-29
1298 visits
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Scientific American 1915-06-19
1265 visits
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Scientific American 1915-06-26
1217 visits
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Scientific American 1917-04-28
1424 visits
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Scientific American 1917-07-14
1237 visits
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Scientific American 1918-04-27
1589 visits
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Scientific American 1918-06-01
1294 visits
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Scientific American 1918-06-15
1442 visits
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Scientific American 1918-06-22
1175 visits
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Scientific American 1918-06-29
1324 visits