Stata base reference manual: volume 3. N-R   :volume 3. N-R 

 - College station, Texas :  A state place publication,  1985-2003. 
 - 451p.   : ill. ;  24cm. 
<br/><br/><label>ISBN: </label>1-881228-72-X 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>LC Class. No.: </label>HA32.S673