000 00286nam a2200097Ia 4500
008 230930s9999||||xx |||||||||||||| ||und||
100 _aWebb,Eugene J. Etels
245 0 _aUnobtrusive Measures:Nonreactive Research in The Social Sciences
260 _aUSA
260 _bRand McNally & Company
999 _c20964
_d20964