TY - BOOK ED - School Specialty Publishing (Firm) TI - Inventions & discoveries T2 - Just the facts SN - 076964256X AV - T48 .I55 2006 U1 - 609 22 PY - 2006/// CY - Columbus, Ohio PB - School Specialty Pub. KW - Inventions KW - Juvenile literature KW - Technology KW - Discoveries N1 - Includes index N2 - A look at inventions throughout history, from flint tools and the wheel to the Internet ER -