Unobtrusive measures [electronic resource] / Eugene J. Webb ... [et al.].
Material type: TextSeries: Sage classics ; 2.Publication details: Thousand Oaks, Calif. ; London : SAGE, c1999.Edition: Rev. edDescription: 1 online resource (xix, 220 p.)ISBN:- 9781452243443 (ebook) :
- 300.72 23
- H62 .N675 1999
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Previous ed.: published as Nonreactive measures in the social sciences. 2nd ed. 1981.
Includes bibliographical references and index.
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