Spross, Patricia McNitt,  1913- <br/><br/>
Elementary arithmetic and learning aids / 
by Patricia M. Spross. 
 - Washington :  U.S. Dept. of Health, Education, and Welfare, Office of Education ; [for sale by the Superintendent of Documents, U.S. Govt. Print. Off.,  1965. 
 - vi, 134 p. :  ill. ;  26 cm. 
 - Circular (United States. Office of Education) ;  no. 784 .
<br/><br/> "OE-29063."  L111.A72 no. 784 bound with Circular no. 785-no. 789 subsequent to publication. 
<br/><br/>Bibliography: p. 129-134. 
<br/><br/><label>LCCN: </label>hew66000030  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching (Elementary)<br/>Mathematics--Study and teaching (Elementary)<br/>Teaching--Aids and devices.
<br/><br/><label>LC Class. No.: </label>L111  / .A72 no. 784