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2
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Research methods : issues and insights / edited by Billy J. Franklin, Harold W. Osborne.
- 301.018 F8312
- Franklin, Billy J.
- Wadsworth Pub. Co.,
- c1971.
- Belmont, Calif. :
-
Survey research methods / Earl R. Babbie.
- 300.723 B1126
- Babbie, Earl R.,
- Wadsworth Pub. Co.,
- Belmont, Calif. :