Unobtrusive measures
Subtitle: non-reactive research in the social sciences
By: par Eugene J. Webb ... (et al.)
Contributors: Campbell, Donald T.; Schwartz, Richard D.; Sechrest, Lee
Series: Rand McNally sociology series
Publisher: Rand McNally
Published: 1966
Place of publication: Chicago
Language: eng
Number of pages: 225
Subjects: Sciences sociales -- Recherche
Notes: Bibliographie : p. 187-215.

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