Educational returns at varying expenditure levels; a basis for relating expenditures to outcomes in education
by Orrin Edwin Powell ... Published with the approval of Professor Mabel Carney, sponsor
New York city : Teachers college, Columbia University, 1933.
- ix, 54 pages, 1 leaf ; 23 cm
- "The investigation was limited to ... one-teacher school districts."--P. 5.
- Published also as Teachers college, Columbia university, Contributions to education, no. 573.
- Thesis (PH. D.)--Columbia University, 1933.
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