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- 49009408 contributor B1155236.
- 49009408 contributor B1155237.
- 49009408 created "1949.".
- 49009408 date "1949".
- 49009408 date "1949.".
- 49009408 dateCopyrighted "1949.".
- 49009408 extent "xvi, 207 p.".
- 49009408 isPartOf "Duke University research studies in education, no. 8".
- 49009408 isPartOf "Duke University. Duke University research studies in education ; no. 8.".
- 49009408 issued "1949".
- 49009408 issued "1949.".
- 49009408 language "eng".
- 49009408 publisher "Durham, N.C., Duke Univ. Press,".
- 49009408 subject "372.7".
- 49009408 subject "Learning, Psychology of.".
- 49009408 subject "QA115 .B86".
- 49009408 subject "Subtraction.".
- 49009408 title "Meaningful vs. mechanical learning; a study in grade III subtraction by William A. Brownell and Harold E. Moser, with the assistance of Samuel L. Abbot, Jr. [and others]".
- 49009408 type "text".