TY  - BOOK
AU  - Klose,Orval M.
TI  - 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 
T2  - The Commonwealth and international library. Mathematics division
PY  - 1966///
CY  - Oxford
PB  - Pergamon Press
KW  - Arithmetic
KW  - Foundations
ER  -