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- 15015111 contributor B533368.
- 15015111 created "1915.".
- 15015111 date "1915".
- 15015111 date "1915.".
- 15015111 dateCopyrighted "1915.".
- 15015111 description "Thesis (Ph. D.)--University of Pennsylvania, 1914.".
- 15015111 extent "102 p.".
- 15015111 issued "1915".
- 15015111 issued "1915.".
- 15015111 language "eng".
- 15015111 publisher "Trenton, N.J., State gazette publishing co., printers,".
- 15015111 subject "Arithmetic Study and teaching.".
- 15015111 subject "BF456.N7 H6".
- 15015111 subject "Educational psychology.".
- 15015111 title "An experimental study to determine the relative difficulty of the elementary number combinations in addition and multiplication ... By Harry Vance Holloway ...".
- 15015111 type "text".