Permissibility electric face equipment / 
United States, Department of Labor 
 - Washington, D.C. :  The Department,  1979 
 - 28 p. ;  18 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor market--United States
<br/><br/><label>Dewey Class. No.: </label>331.120973