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Research methods in social relations / Claire Selltiz, Lawrence S. Wrightsman, Stuart W. Cook ; in collaboration with George I. Balch, Richard Hofstetter, Leonard Bickman.
- 300.72 S4682 1976
- Selltiz, Claire.
- Holt, Rinehart and Winston,
- c1976.
- New York :
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Elementary statistical methods / Helen M. Walker, Joseph Lev.
- 311.2 W1772 1958
- Walker, Helen M. 1891-1983.
- Holt, Rinehart and Winston,
- c1958.
- New York :