000 00282nam a2200121Ia 4500
008 250224s9999 xx 000 0 und d
020 _a9781506386591
082 _a370.72JOH
100 _aJohnson R. Burke
245 0 _aEducational research
260 _bSage
_c2017
942 _cBK
999 _c473647
_d473647