Stata 7 ;  stata reference manual/ 

 - Texas :  Stata press,  2001 
 - 525 p. :  ill.; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>1881228479 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Stata reference
<br/><br/><label>LC Class. No.: </label>QA276.4 .S825 2001