Pullan, J. M. <br/><br/>
The history of the abacus 
[by] J. M. Pullan. 
 - New York  F.A. Praeger  [1969, c1968]. 
 - xiii, 127 p.  ill.  22 cm. 
<br/><br/>Bibliography: p. 116-120. 
<br/><br/><label>LCCN: </label>72075113  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abacus.
<br/><br/><label>LC Class. No.: </label>QA75  / .P8 1969 
<br/><br/><label>Dewey Class. No.: </label>511/.2078/09