00308nam a2200109Ia 4500082002100000100002100021245009800042260002300140300002500163500000500188700000500193  a658.568bEk36.SB  aEkambaram, S. K.  aThe statistical basis of quality control charts; a manual for business and factory managersb  aBombaybAsiac1960  ax, 96p. Index, Bibl.  a  a