CLARK, MAE KNIGHT.
Numbers at work, by Mae Knight Clark & Laura Cushman. Illustrated by Marion & Doris Henderson. (Self-help number series)
CLARK, MAE KNIGHT. Numbers at work, by Mae Knight Clark & Laura Cushman. Illustrated by Marion & Doris Henderson. (Self-help number series) © 22Oct35; AA186932. Mae Knight Clark & Laura Cushman (A); 30Oct62; R303672.
Mae Knight Clark & Laura Cushman|A