Hacker, Sidney G.,    1908- <br/><br/>
Fundamental concepts of arithmetic /    
by Sidney G. Hacker, Wilfred E. Barnes and Calvin T. Long. 
 - London :   Prentice-Hall,   1963 
 - xiv, 271 p.:    ill., diagrs.;    23 cm. 
<br/><br/>Includes bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic.--------
<br/><br/><label>Dewey Class. No.: </label>511 HAC