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006 g||||fr|||| a0| fz
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040 _aeng
082 _a001.42 T80R
100 _aTrochim, William M.
245 _aResearch Methods: The Essential Knowledge Base
260 _aNew Delhi,
260 _bCengage Learning
260 _c106
942 _cBK
999 _c26864
_d26864