Today's mathematics : concepts and methods in elementary school mathematics /
Heddens, James W.
Today's mathematics : concepts and methods in elementary school mathematics / James W. Heddens. - 4th ed. - United States : Library of Congress Cataloging, 1925. - 590 p. : ill. ; 27.5 cm.
Includes index.
0574230955
Mathematics --Study and teaching (Elementary).
510.7 HED
Today's mathematics : concepts and methods in elementary school mathematics / James W. Heddens. - 4th ed. - United States : Library of Congress Cataloging, 1925. - 590 p. : ill. ; 27.5 cm.
Includes index.
0574230955
Mathematics --Study and teaching (Elementary).
510.7 HED