Heiken, Grant <br/><br/>
An Atlas of volcanic ash / 
by Grant Heiken 
 - City of Washington :  Smithsonian Institution Press,  1974 
 - iv, 101 p. :  ill. ;  26 cm. 
 - Smithsonian contributions to the earth sciences ;  no. 12 .
<br/><br/>Bibliography : p. 13-14 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Volcanic ash, tuff, etc.