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- 47023604 contributor B1116920.
- 47023604 contributor B1116921.
- 47023604 created "1946.".
- 47023604 date "1946".
- 47023604 date "1946.".
- 47023604 dateCopyrighted "1946.".
- 47023604 extent "ii, 33 numb. l. incl. tables.".
- 47023604 isPartOf "[Toronto. University. Ontario College of Education] The Dept. of Educational Research. Educational research series, no. 13".
- 47023604 issued "1946".
- 47023604 issued "1946.".
- 47023604 language "eng".
- 47023604 publisher "[Toronto] The Dept. of educational research, Ontario college of education, University of Toronto,".
- 47023604 subject "372.7".
- 47023604 subject "Arithmetic Study and teaching.".
- 47023604 subject "QA135 .P48".
- 47023604 title "Relative difficulties of the fundamental facts in arithmetic based on a study of errors made by Ontario children [by] A.J. Phillips and H.M. Fowler ...".
- 47023604 type "text".