Leffingwell, William Henry.  1876-1934. <br/><br/>
Textbook of office management / 
by William H. Leffingwell and Edwin M. Robinson. 
 - 3rd ed. 
 - New York :  McGraw-Hill,  c1950. 
 - xiv, 649 p.  ill. ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/>
<br/><br/><br/>english 
<br/><br/><label>LCCN: </label>50007324  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Office management.
<br/><br/><label>LC Class. No.: </label>HF5547  / .L45 1950 
<br/><br/><label>Dewey Class. No.: </label>651/LET