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- 39031389 contributor B952959.
- 39031389 created "1939.".
- 39031389 date "1939".
- 39031389 date "1939.".
- 39031389 dateCopyrighted "1939.".
- 39031389 description "Bibliography: p. 151-160.".
- 39031389 description "Thesis (Ph. D.)--Columbia university, 1939.".
- 39031389 extent "x p., 1 l., 179, [1] p. incl. tables, diagrs.".
- 39031389 issued "1939".
- 39031389 issued "1939.".
- 39031389 language "eng".
- 39031389 publisher "New York, Teachers college, Columbia university,".
- 39031389 subject "Ability.".
- 39031389 subject "Children with disabilities Education.".
- 39031389 subject "Mathematics Study and teaching.".
- 39031389 subject "QA11 .M25 1939".
- 39031389 title "The relative difficulty of certain topics in mathematics for slow-moving ninth grade pupils, by Virgil Sampson Mallory ...".
- 39031389 type "text".