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
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