X and R variable control charting  [videorecording] / 
Coastal Skills Training 
 - Virginia Beach, Va. :  Coastal Video Communications Corp.  1990 
 - 1 videodisc (26 min.) :  sd.,col.;  12 cm. 
<br/><br/><label>ISBN: </label>MED0002459(Local) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Process control<br/>Statistical methods