Zinkgraf, Stephen A.  1948- <br/><br/>
Six sigma:  the first 90 days/ 
Stephen A. Zinkgraf ; with contributions from Sigma Breakthrough Technologies, Inc., Instantis, Inc., and Peak Performance Consulting Corporation. 
 - xxi, 382 pages:  illustration;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9780131687400 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Six sigma (Quality control standard)