TY  - BOOK
TI  - Inventions and discoveries: economics
SN  - 9780716603924
U1  - HS Ref 330 E262 2009 
PY  - 2009///
CY  - Chicago
PB  - World Book, Inc.
KW  - Economics--Juvenile literature
KW  - Economic history--Juvenile literature
KW  - Inventions--Juvenile literature
N1  - Includes index
ER  -