Developing mathematical understandings in the upper grades /
Brueckner, Leo J. 1890-1967.
Developing mathematical understandings in the upper grades / [by] Leo J. Brueckner, Foster E. Grossnickle [and] John Reckzeh. - Philadelphia, Winston 1957 - 567 p. illus. 22 cm.
57002762
Mathematics--Study and teaching (Secondary).
QA11 / .B848
510 / BRD 1957
Developing mathematical understandings in the upper grades / [by] Leo J. Brueckner, Foster E. Grossnickle [and] John Reckzeh. - Philadelphia, Winston 1957 - 567 p. illus. 22 cm.
57002762
Mathematics--Study and teaching (Secondary).
QA11 / .B848
510 / BRD 1957