Ballard, Martin <br/><br/>
Revolutions and steam engines: age of progress 

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 - London  Methuen  1971 
 - 80p.   
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<br/><br/><label>Subjects--Index Terms: </label>Steam engines - Revolutions 
<br/><br/><label>Dewey Class. No.: </label>930.9"1775/1815"