Gitlow, Howard S. Design for six sigma for green belts and champions : applications for services operations- foundations,tools, dmadv, cases, and certification. - New Delhi : Dorling Kindersley Pvt. Ltd., 2006. - xxix, 688 p. : ill. ; 24 cm. ISBN: 8131704505 Subjects--Topical Terms: Sig Sigma. Dewey Class. No.: REF GIT