000 00605nam a22001817a 4500
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008 170511b xxu||||| |||| 00| 0 eng d
040 _aUCULIB
_cUCULIB
082 _222
_a001.4
_bUNO
245 _aUnobtrusive Measures :
_bnonreactive research in the social sciences /
_cEugene J. Webb ... [et al.].
260 _aChicago :
_bRand McNally & Company,
_cc1966.
300 _aviii, 225 p. ;
_c22 cm.
504 _aIncludes bibliographical references (p. 187-215) and index.
650 _aResearch
_xSocial sciences
700 _aWebb, Eugene J.
942 _2ddc
_cOSB
999 _c44264
_d44264