1
Published in 1900
monograph
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2
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7
Published in 1891
journal article
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9
Published in 1900
journal article
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11
Published in 1950
journal article
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12
Published in 1936
monograph
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13
14
Published in 1938
journal article
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16
Published in 1951
journal article
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19
Published in 1968
journal article
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