SAS Institute Inc. <br/><br/>
SAS/OR user's guide   

 - North Carolina  SAS  1989 
 - xxviii, 479p. Index. 
<br/><br/> "Version 6"   
<br/><br/><label>ISBN: </label>1555443249 
<br/><br/><label>Dewey Class. No.: </label>518.5425  / Sa252.SO