TY  - BOOK
AU  - Kent, Graeme.
TI  - Investigation: past into present series 
U1  - 608 KEN 
PY  - 1971///
CY  - London
PB  - B. T. Batsford Ltd
KW  - Inventions
KW  - Juvenile literature
KW  - Inventions, to 1970 Juvenile literature
N1  - Includes index
ER  -