TY  - BOOK
AU  - Webb,Eugene J.
TI  - Unobtrusive measures
T2  - Sage classics
SN  - 9781452243443 (ebook) :
AV  - H62 .N675 1999
U1  - 300.72 23
PY  - 1999///
CY  - Thousand Oaks, Calif., London
PB  - SAGE
KW  - Social sciences
KW  - Research
N1  - Previous ed.: published as Nonreactive measures in the social sciences. 2nd ed. 1981; Includes bibliographical references and index
UR  - http://knowledge.sagepub.com/view/unobtrusive-measures/SAGE.xml
ER  -