000 00495nam a2200169Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a331.114
_bB628
100 _aBlackburn J M
245 _aAcquisition of skill
_ban analysis of learning curves
260 _aLondon
_bH M S Office
_c1936
300 _aiv,92p.
440 _aMedical Research Council.Industrial Health Research Board,Report; no.73
650 _aLabor economics
942 _cBK
999 _c59659
_d59659