Dempsey, G. Drysdale <br/><br/>
Rudimantary treatise on tubular and other Iron girderbridges / 
by G. Drysdale Dempsey 
 - 4th ed. 
 - London :  Crosby Lockwood,  1912. 
<br/><br/><label>Subjects--Index Terms: </label>Chemistry Iron