Reference manual stata relese 3.1 

 - College Station, TX. :  Stata Corporation,  1993 
 - 477 p. :  ill. ;  24 cm 
<br/><br/> Photocopy (IKMAS) 
<br/><br/><label>ISBN: </label>0534189180 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistic--data processing