The surveillance and prediction of volcanic activity :  a review of methods and techniques / 
Unesco. 
 - Paris :  Unesco,  c1972. 
 - l66 p. :  illus. ;  28 cm. 
 - Earth sciences,  8. .
 -  8. Earth sciences, .
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Volcanoes.
<br/><br/><label>Dewey Class. No.: </label>551.21  / UNS 1972