Duff, A.Wilmer . <br/><br/>
Physical Measurements /  Textual Documents 
A.Wilmer Duff & Arthur W.Ewell. 
 - 2nd Rev.ed. / 
 - London :  J.&.A. Churchill ,  1911. 
 - 258p. :  ill ;  23cm . 
<br/><br/> With 78 Illustrations 
<br/><br/><label>Subjects--Index Terms: </label>Physics Physical Measurements Measurements-Physical G-Physics 
<br/><br/><label>Dewey Class. No.: </label>535  / D 873 P