TY  - BOOK
TI  - Inventions and discoveries: communication
SN  - 9780716603825
U1  - HS Ref 302.2 C737 2009 
PY  - 2009///
CY  - Chicago
PB  - World Book, Inc.
KW  - Communication--Technological innovations--History--Juvenile literature
N1  - Includes index
ER  -