SAS language and procedures :  usage, version 6. 

 - 1st ed. 
 - Cary, NC :  SAS Institute,  c1989. 
 - xxx, 638 p. :  ill. (some col.) ;  28 cm. 
<br/><br/><label>ISBN: </label>1555443710 
<br/><br/><label>Dewey Class. No.: </label>519 SAS 1989 A059 Or.