Larsen, Egon.  4  0   <br/><br/>
Kasaysayan ng imbensiyon :  may 70 larawang-guhit kabilang ang maraming iginuhit ni George Lana /      6 
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Egon Larsen. 
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 - xiv, 484 pages. :  illustration.   22 cm.     
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<br/><br/><label>ISBN: </label>  
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<br/><br/><label>Subjects--Geographic Terms: </label>--*Inventions.;
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