TY  - BOOK
AU  - Bonnet,Robert L.
AU  - Keen,Dan jtauthor
TI  - Earth science: 49 science fair projects 
SN  - 0830692878
PY  - 1990///
CY  - New York
PB  - TAB Books
KW  - Earth sciences
KW  - Experiments
KW  - Exhibitions
KW  - Science projects
N1  - Open access
ER  -