Feynman, Richard P. <br/><br/>
Six not- so - easy pieces   : Einstein's relativity, symmetry, and space-time 
/ Richard P. Feynman ; Introduced by Roger Penrose. 
 - 152 pages ;  24 cm. 
<br/><br/><label>ISBN: </label>0201150255 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Symmetry.<br/>Relativity.<br/>Time.
<br/><br/><label>Dewey Class. No.: </label>530.11  / F435