Grossnickle, Foster E. Discovering meanings in arithmetic / Foster E. Grossnickle and Leo J. Brueckner. - Philadelphia : Winston, c 1959. - iv, 442 p. : ill. ; 25 cm. Includes index. 340 340 15 Subjects--Topical Terms: Arithmetic--Study and teaching. Dewey Class. No.: 511.07 / G914d