FEHS, Howard F.
Teaching modern mathematics in the elementary school - 2d ed. - Reading, Mass., Addison-Wesley Pub. Co. 1972. - xviii , 515 p . : ill . ; 24 cm. - Addison-Wesley series in education .
Mathematics
510.7
Teaching modern mathematics in the elementary school - 2d ed. - Reading, Mass., Addison-Wesley Pub. Co. 1972. - xviii , 515 p . : ill . ; 24 cm. - Addison-Wesley series in education .
Mathematics
510.7