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2
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Research methods in education / Louis Cohen and Lawrence Manion.
- 370.72 C6781 1989
- Cohen, Louis, 1928-
- Routledge,
- 1989.
- London ; New York, NY :
-
Research methods in education / Louis Cohen, Lawrence Manion, and Keith Morrison.
- 370.72 C6781 2000
- Cohen, Louis, 1928-
- RoutledgeFalmer,
- 2000.
- London ; New York :