14 DAY USE 



RETURN TO DESK FROM WHICH BORROWED 



EARTH SCIENCES LIBRARY 



^rnis nook is due on the last date stamped below, or 



on the date to which renewed. 

 Renewed books are subject to immediate recall. 



DEC 15 1968 



LD 21^50m-6,'60 

 (B1321slO)476 



General Library 



University of California 



Berkeley 



