Block 7, the earth's origin and evolution 

 - Walton Hall :    The Open University ,    c1981, repr. 1990 
 - 117 p. :    ill. ;    30 cm. 
 - The earth: structure, composition and evolution Science: a second level course. .
<br/><br/><label>ISBN: </label>0335160565 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Earth -- Origin
<br/><br/><label>Dewey Class. No.: </label>550