Tyrrell,  G.W. <br/><br/>
Principles of petrology. 

 -  1982 
<br/><br/> U.G.C. grant. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NO SUBJECT
<br/><br/><label>Dewey Class. No.: </label>552  / TYR/P