Industrial classification code. 

 - 3d ed. 
 - Washington, D.C.,  Federal Security Agency, Social Security Board,  1942. 
 - 3 v. 
<br/><br/> Reproduced from type-written copy.  "Prepared by the Social Security Board, Committee on Industrial Classification Practices."--Foreword. 
<br/><br/>I. Description of industries.--II. Manufacturing index.--III. Nonmanufacturing index. 
<br/><br/><label>LCCN: </label>ss 45000054  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Industries--Classification.--United States
<br/><br/><label>LC Class. No.: </label>HA40.I6  / U65 1942 
<br/><br/><label>Dewey Class. No.: </label>331.7