TY  - BOOK
AU  - Lucas, Ernest & Hazel
TI  - Our world: how? what? when? why? 
SN  - 0-7324-0501-7
AV  - M 559 L96 1986
PY  - 1986///
CY  - Illinois
PB  - Lion Publishing
KW  - Earth--Juvenile literature
N2  - Life on planet earth: past, present and future
ER  -