000 00448nam a2200157Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a331.126
_bUn58
110 _aUS. Dept. of Labour
245 _aTrends in output per man hour and man hours per unit of output manufacturing,1939-53
260 _aWashington
_bGovt.Printing
_c1955
300 _a334p.
650 _aLabor economics
942 _cBK
999 _c96570
_d96570