000 00488nam a22001577a 4500
003 OSt
005 20180301093803.0
008 180301b xxu||||| |||| 00| 0 eng d
040 _aLB-BrCRDP
082 _a371.102 U58d
110 _aU.S. Department of Health, Education, and Welfare
245 _aDo Teachers Make a Difference?
_bA Report on Recent Research on Pupil Achievement
260 _aWashington
_bU.S. Government Printing Office
_c1970
300 _a181p
_c23cm
942 _2ddc
_cBK
999 _c18808
_d18808