Eckel, E. B. <br/><br/>
Opportunities and responsibilities of earth scientists in the nuclea r age /  
E. B. Eckel. 
 - Washington, D.C. :    The U.S. Geological Survey,    1960. 
 - 8 p. ;    27 cm. 
 - Geological Survey Circular ;    no.430 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Gov. Doc. Class. No.: </label>G.U.S. I53 (08) 1/430