Childs, W. H. J. <br/><br/>
Physical constants: selected for students, 
[by] W. H. J. Childs. 
 - 9th ed. 
 - London :  Chapman and Hall,  1972. 
 - 107 p.  ill.  20 cm. 
<br/><br/><label>ISBN: </label>0412210509 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical constants--Tables.