000 00343nam a2200133Ia 4500
008 220412s9999 xx 000 0 und d
082 _a808.04 V24t 2016
100 _aValenzuela, Edwin E.
245 0 _aResearch methods and techniques
260 _aQuezon City
_bGreat Books Trading
_c2014
300 _a171
942 _cBK
999 _c21120
_d21120