00906cam a22002651 4500 7443691 BD-DhUL 20181213121629.0 721226s1953 dcua b 000 0 eng 53001499 (OCoLC)523811 DLC ODaWU OCoLC WaChenE OCoLC DLC BD-DhUL premarc QA1 .N3 21st 510.1 NAL National Council of Teachers of Mathematics. The learning of mathematics : its theory and practice / edited by Howard F. Fehr. Washington : 1953. National Council of Teachers of Mathematics, ix, 355 p. : ill. ; 24 cm. Its Yearbook ; 21 Includes bibliographical references and index. Mathematics Study and teaching. Fehr, Howard F. (Howard Franklin), 1901- ed. ddc BK 245270 245270 0 0 ddc 0 510_100000000000000_NAL 0 NFIC 373336 DUSL DUSL GEN 2018-12-13 Gift 510.1 NAL 306166 2018-12-13 2018-12-13 BK