UMBGROVE, J.H.F <br/><br/>
The pulse of the earth 
/by J.H.F.Umbgrove 
 - Holland  Martinus Nijhoff  1947 
 - xxii, 358 p. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>82971 
<br/><br/><label>Dewey Class. No.: </label>910.11  / UMB