On upper mantle project 
National Geophysical Research Board  
 - Hyderabad  National Geophysical Research Institute  1970 
 - xli, 604p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and astrophysics thesaurus<br/>Extragalactic radio sources<br/>Quasars
<br/><br/><label>Universal Decimal Class. No.: </label>550.3  / NGR