Ampian, Sarkis G. <br/><br/>
Crystalline silica overview :  occurrence and analysis / 
by Sarkis G. Ampian and Robert L. Virta. 
 - Washington, D.C. :  U.S. Dept. of the Interior, Bureau of Mines,  1992. 
 - ii, 27 p. :  ill. ;  28 cm. 
 - Information circular ;  9317 .
 - Information circular (United States. Bureau of Mines) ;  9317. .
<br/><br/>Includes bibliographical references (p. 26-27). 
<br/><br/><label>LCCN: </label>92000700  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Silica.<br/>Silica--Toxicology.<br/>X-rays--Diffraction.
<br/><br/><label>LC Class. No.: </label>TN295  TN948.S6  / .U4 no. 9317 
<br/><br/><label>Dewey Class. No.: </label>622 s  549/.6/0287 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.27:9317