The Business blue book  
compiled by Secretarial Services, Inc. 
 - Washington, D.C. :  Secretarial Services,  [1971], c1968. 
 - [78] leaves ;  19 cm. 
<br/><br/> "October 1, 1971." 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Industries--Directories.--Washington (D.C.)<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>650  / BUI