Pickworth, Gharless N. <br/><br/>
INSTRUCTIONS FOR THE USE OF A. W. FABER'S IMPROVED CALCULATING RULE 

 - London  Manufactory Established  1761 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>MCE
<br/><br/><label>Dewey Class. No.: </label>510  / PIC