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3
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Educational research : a guide to the process / Norman E. Wallen.
- 370.72 W197 1974
- Wallen, Norman E.
- Wadsworth Publishing Company,
- c1974.
- Belmont, Calif. :
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Essential algebra / C.L. Johnston, Alden T. Willis, Gale M. Hughes.
- 512 J721 1985
- Johnston, C. L. 1911-
- Wadsworth Publishing Company,
- c1985.
- Belmont, Calif. :
-
Survey research methods / Earl Babbie.
- 300.723 B1126 1990
- Babbie, Earl R.,
- Wadsworth Publishing Company,
- Belmont, California :