Chowdhury, Subir. The power of Six Sigma : an inspiring tale of how Six Sigma is transforming the way we work / Subir Chowdhury. - Chicago : Dearborn Trade, c2001. - xiii, 124 p. ; 20 cm. ISBN: 0793144345 LCCN: 00012888 LC Class. No.: HD31 .C514 2001 / .C514 2001 Dewey Class. No.: 658