00528nam a2200169Ia 4500008004100000082001600041100002500057245004400082250001200126260003800138300001400176600002400190650002500214942000700239952009500246999001700341140224s9999    xx            000 0 und d  a37.001.5 K9  aTravers, Robert M.W.  aAn introduction to educational research  a3rd ed.  aLondonbCollice-Macmillancc 1969  axxi,450p.  aRobert M.W. Travers  aEducational research  cBK  00104070aKSDbKSDd2014-02-24l0o37.001.5 K9p824r2014-02-24 00:00:00w2014-02-24yBK  c91370d91370