TY  - BOOK
AU  - Bonnet,Robert L.
AU  - Keen,Dan
TI  - Environmental science: 49 science fair projects 
T2  - Science fair projects series
SN  - 9780230633692
AV  - TD 178 .B66 1990
U1  - HS 628.078  
PY  - 1990///
CY  - Blue Ridge Summit, PA
PB  - Tab Books
KW  - Environmental sciences
KW  - Experiments
KW  - Juvenile literature
KW  - Pollution
KW  - Science projects
KW  - Ecology
ER  -