Silberstein, Ludwik,  1872- <br/><br/>
The size of the universe :  attempts at a determination of the curvature radius of spacetime / 
by Ludwik Silberstein 
 - London :  The University Press,  1930 
 - viii, 215 p. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Relativity (Physics)