1
Published in 1951
technical report
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3
4
Published in 1948
technical report
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6
Published in 1950
journal article
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7
Published in 1924
journal article
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8
Published in 1929
journal article
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9
Published in 1938
journal article
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10
Published in 1953
journal article
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11
Published in 1953
journal article
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12
13
Published in 1950
journal article
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17
19
Published in 1919
journal article
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20
Published in 1900
journal article
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