Johnson, Wilton. <br/><br/>
Cement / 
Wilton Johnson. 
 - Pittsburgh, PA :  Bureau of Mines,  1987. 
 - 28 p. 
<br/><br/> "Preprint from the 1987 Bureau of Mines Minerals Yearbook"--Cover. 
<br/><br/><label>LCCN: </label>90043027     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral industries--Periodicals.--United States<br/>Mines and mineral resources--Periodicals.--United States<br/>Cement industries.