000 00310nam a2200109Ia 4500
008 220204s9999 xx 000 0 und d
082 _a159.9.07
_bKRA
245 0 _aSingle subject research: Strategies for evaluating change
260 _aNew York
_bAcademic
_c1978
700 _aKratochwill, Thomas R
942 _cBK
999 _c28605
_d28605