1.

図書
図書
1. Primer of statistics. 4th ed
by W. Palin Elderton and Ethel M. Elderton
出版情報: London : A. & C. Black, 1923
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2.

図書
図書
2. Frequency-curves and correlation
by W. Palin Elderton
出版情報: London : Published for the Institute of Actuaries by C. and E. Layton, [1906]
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