00772nam a2200217 a 4500001001400000003000400014008004100018020001500059039010600074050001700180093002200197100002800219245007100247250001200318260003700330300001800367650003100385942000800416999001300424952011700437vtls000000205MTX960804c1991    enga     b    00110 eng d  a0205137938 9a201507171141bser3c201311070721dVLOADc201105091710dVLOADc201008280815dVLOADy200206121342zload00aLB1028bW517  aED001 ED002 ED0031 aWiersma, William.9575910aResearch methods in education : An introduction /cWilliam Wiersma  a5th ed.  aLondon :bAllyn and Bacon,c1991  a443 p. :bill 0aEducationxResearch.95756  cGBE  c201d201  r2018-03-12 00:00:00oLB1028 W517p1000013967t1w2018-03-12yGBE1040708CGB00aSPbSPcGENd2018-03-12g0.00