TY - BOOK AU - Cooper, Harris M. TI - Research synthesis and meta-analysis : a step-by-step approach ET - 4th ed PB - Sage PY - 2010 T2 - Applied social research methods series VL - v. 2 EP - ix, 269 p. UR - https://ci.nii.ac.jp/ncid/BA90260079 SN - 9781412937054 ER -