Walker, Arthur L.  1899- <br/><br/>
How to use adding and calculating machines / 
Arthur L. Walker, J. Kenneth Roach, J. Marshall Hanna. 
 - Fourth Edition. 
 -  c1979. 
 - 218 pages :  illustrations ;  28 cm. 
<br/><br/><label>ISBN: </label>0070678251 
<br/><br/><label>LCCN: </label>77025896  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculators--Problems, exercises, etc.
<br/><br/><label>LC Class. No.: </label>HF5548  / .W3 1979 
<br/><br/><label>Dewey Class. No.: </label>651.82