Hartree Douglas R <br/><br/>
Calculating instruments and machines 

 -  1942 
<br/><br/><label>Standard No.: </label>11,144 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INDUSTRIAL ARTS
<br/><br/><label>Dewey Class. No.: </label>MB1, H9