Derr, Louis <br/><br/>
Cyclopedia of engineering 
Derr, Louis 
 - Chicago  American Technical Society  1921 
 - 522 p.  ill.  23 cm 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Locomotive boilers engines air-brake ssytems<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>621.03  / CYC