Copper and copper alloy springs. 

 - London,  Copper development association  [1944] 
 - 61 p.  incl. front., illus., diagrs.  22 cm. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Springs (Mechanism)
<br/><br/><label>Dewey Class. No.: </label>669.3  / COP