Klose, Orval M. <br/><br/>
The number systems and operations of arithmetic :  an explanation of the fundamental principles of mathematics which underlie the understanding and use of arithmetic, designed for in-service training of elementary school teachers and pre-service training of elementary school teacher candidates / 
Orval M. Klose. 
 - 1st ed. 
 - Oxford :  Pergamon Press,  1966. 
 - xi, 265 p. :  ill. 
 - The Commonwealth and international library. Mathematics division. .
 - Commonwealth and international library of science and technology, engineering, and liberal studies.  Mathematics division. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Foundations.