Understanding the earth  : a reader in earth sciences 
edited by  I .G.Gass 
 - 2nd 
 - Sussex:  The Artemis Press,  1972. 
 -  383p. 
<br/><br/> PB 
<br/><br/><br/>Eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Open University, U K
<br/><br/><label>Dewey Class. No.: </label>551.1  / GAU