NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS.
The teaching of algebra. Seventh yearbook. W. D. Reeve, editor.
NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS. The teaching of algebra. Seventh yearbook. W. D. Reeve, editor. © 20Feb32; A50154. National Council of Teachers of Mathematics (PCW); 4Aug59; R240639.
National Council of Teachers of Mathematics|PCW