Injury experience in nonmetallic mineral minning (except stone and coal), 1979 

 - Washington, D.C. :  United States Dept. of Labor,  1980 
 - ii, 290 p. ;  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral industries<br/>Mineral industries
<br/><br/><label>Dewey Class. No.: </label>338.2