Childs, Williams Harolds Joseph <br/><br/>
Physical constants : Selected for students / 
by W.H.J.Childs. 
 - 6a ed. 
 - London :  Methuen and co.,   1951 
 - 77 p. :  17 cm. 
 - Monographs on physical subjects .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Física--Tablas 
<br/><br/><label>LC Class. No.: </label>QC61  / C45 1951