Ritis R De Et Al <br/><br/>
General Relativity and Gravitational Physics - Proceedings of the 9Th Italian Conference 

 -  World Scientific  WSPC  1991 
<br/><br/><label>ISBN: </label>9789814538473 
<br/><br/><label>Source: </label>EBOOK 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics