Cooper, Henry O.  <br/><br/>
Instructions for the use of A.W. Faber "Castell" precision calculating rules 
Henry O. Cooper 
 - Stein   A. W. Faber 
<br/><br/><label>ISBN: </label>978-0265784334 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculating Rules
<br/><br/><label>Universal Decimal Class. No.: </label>681.332  / COO