TY - BOOK TI - Shapes and numbers T2 - Childcraft : the how and why library ; #8 SN - 9780716622598 U1 - 513.2 PY - 2013/// CY - Chicago PB - World Book KW - Geometry KW - Juvenile literature KW - Numbers, Natural KW - Mathematics KW - Arithmetic N1 - Includes glossary and index; Primary ER -