Naeser, Charles W. <br/><br/>
Fission-track and K-Ar ages of natural glasses / 
by C. W. Naeser, G. A. Izett, and J. D. Obradovich 
 - Washington :  U.S. Govt. Print. Off.,  1980 
 - iv, 31 p. :  ill. ;  23 cm. 
 - Geological Survey bulletin ;  1489 .
<br/><br/>Bibliography: p. 13-15 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Obsidian<br/>Tektite<br/>Radioactive dating
<br/><br/><label>Dewey Class. No.: </label>552.2