@book{14934,
	author = {Grossnickle, Foster E. and Brueckner, Leo J.},
	title = {Discovering meanings in elementary school mathematics},
	publisher = {Holt, Rinehart and Winston},
	year = {[1968]},
	address = {New York},
	edition = {5th ed.},
	note = {First ed., 1947, by L. J. Brueckner and F. E. Grossnickle, has title: How to make arithmetic meaningful; 2d ed., 1953, by L. J. Brueckner and F. E. Grossnickle, has title: Making arithmetic meaningful; 3d ed., 1959, by F. E. Grossnickle and L. J. Brueckner, has title: Discovering meanings in arithmetic.}
}