Charles. N Pickworth <br/><br/>
Instructions for the use of A W Fabers improved calculating rule 

 - London  A. W. Faber 
 - 50+Sheets 
<br/><br/>Charles. N Pickworth: Instructions for the use of A W Fabers improved calculating rule.  London.  A. W. Faber,--(510.78PIC)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>510.78  / PIC