Langman H.R <br/><br/>
How to make working diagram models 

 - London  The Technical press UK       1939 
 - 73p  cm. 
<br/><br/><label>Standard No.: </label>72984 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENGINEERING
<br/><br/><label>Dewey Class. No.: </label>D66, G9