Unwin, W. C. <br/><br/>
Report on the gauge length and section of test bar on the percentage of elongation / 
by W. C. Unwin 
 - London :  Crosby Lockwood,  1903 
 - 21 p. ;  31 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Steel, Structural--Testing<br/>Strength of materials<br/>Mechanics