"0, . "
new trends in mathematics teaching: / - 1 ed. - unesco 1973. - "xi, 143p.; 27 cm."
includes bibliography
92-3-101016-6
510. 7 une
new trends in mathematics teaching: / - 1 ed. - unesco 1973. - "xi, 143p.; 27 cm."
includes bibliography
92-3-101016-6
510. 7 une