Amsden, Robert T. , SPC simplified : practical steps to quality / Robert T. Amsden, Howard E. Butler, Davida M. Amsden. - 2nd ed. - xii, 287 pages : illustrations ; 23 cm. ISBN: 9780527763404 0527763403 Subjects--Topical Terms: Quality control --Statistical methods. LC Class. No.: TS156 / .A47 1998