@Book{OL7658690M, title: {Math on the Playground}, author: {William Amato}, publisher: {Children's Press (CT)}, year: {2002}, } @Book{OL5115136M, title: {Readings for mathematics: a humanistic approach}, author: {G. Joseph Wimbish}, publisher: {Wadsworth Pub. Co.}, year: {1972}, place: {Belmont, Calif}, } @Work{OL8112803W, title: {Primary Mathematics (SPMG)}, author: {Scottish Primary Mathematics Group}, first_publish_year: {1984} } @Work{OL15857212W, title: {The World book of math power}, author: {World Book Encyclopedia}, first_publish_year: {1983} } @Work{OL15696344W, title: {Mathematics}, author: {Scott, Foresman and Company.}, first_publish_year: {2004} } @Author{OL2292009A, name: {Scott, Foresman and Company.}, }