00359nam a2200121Ia 4500082002500000245007700025260004900102653000600151500000500157700000500162100006400167300000600231  a658.5680954bC748.SN  aSeventh national conference on quality control; papers and proceedingsb  aCalcuttabIndian Statistical Institutec1978  a   a  a  aConference on "Quality Control", New Delhi, 19-21 Dec. 1977  a