The effect of time upon variability

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050 0 ‡aBF431 ‡b.W7 1926a
100 1 ‡aWoodyard, Ella, ‡d1878-
245 0 4 ‡aThe effect of time upon variability, ‡cby Ella Woodyard.
260 ‡aNew York city, ‡bTeachers college, Columbia university, ‡c1926.
300 ‡av, 56 p. ‡bincl. tables. ‡c23 cm.
500 ‡aPublished also as Teachers college, Columbia university, Contributions to education, no. 216.
500 ‡aVita.
502 ‡aThesis (PH. D.)--Columbia university, 1926.
504 ‡aBibliography: p. 56.
538 ‡aMode of access: Internet.
650 0 ‡aEducational tests and measurements.
CID ‡a000385132
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DAT 1 ‡a20210912090708.0 ‡b2024-11-20T19:05:55Z
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