How to teach arithmetic.
Wheat, Harry Grove
How to teach arithmetic. - Evanston Ill. Row, Peterson [1951] - vii, 438 p. illus.
51002493
Arithmetic--Study and teaching.
QA135 / .W49
372.7
How to teach arithmetic. - Evanston Ill. Row, Peterson [1951] - vii, 438 p. illus.
51002493
Arithmetic--Study and teaching.
QA135 / .W49
372.7