000 00500nam a2200157Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a371.26
_bRb-72-52
100 _aRiegel K F
245 _aLanguage as labor
_bsemantic activities as the basis for language development
260 _aNew Jersey
_bETS
_c1972
440 _aEducational Testing Service. Princeton : Research bulletin; 52
650 _aEducational tests and measurements
942 _cBK
999 _c79791
_d79791