Childs, W H J <br/><br/>
Physical constants. 

 - 9th ed. 
 - London  Chapman & Hall  1972 
 - 107p.illus.   
<br/><br/>  science paperbacks. 
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<br/><br/><label>Subjects--Index Terms: </label>physical constants  theoretical physics 
<br/><br/><label>Dewey Class. No.: </label>53.081