Stata data-management reference manual :  release 12. 
 Stata release 12 :  data management  Stata 12 data management 

 - College Station, Tex. :  StataCorp LP,  c2011. 
 - v, 636 p. :  ill. ;  24 cm. 
<br/><br/> "A Stata Press Publication."  Includes index. 
<br/><br/><label>ISBN: </label>1597180505 9781597180504 9781597180801 1597180807 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics<br/>Statistics<br/>Social sciences<br/>Social sciences
<br/><br/><label>Dewey Class. No.: </label>310 STA 2011 A107 Or.