000			00403pam a2200145a 44500
082			_a301.018 _bW381u
100			_aWebb, Eugenen J.
245	1		_aUNOBTRUSIVE MEASURES _cNONREACTIVE RESEARCH IN THE SOCIAL SCIENCES
260			_aChicago _bRand Mcnally _c1966
300			_a225
440			_aRand Mcnally Sociology Series _v
650			_aSocial Science Research
964			_gCIRC
997			_a71324 C
999			_c420592 _d420592