Childs W.H.J. <br/><br/>
Physical constants/ 
W.H.J.Childs 
 - London:  Jhon Wily& Sons INC.  1934 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>41211620 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>530.8  / CHI