TY  - BOOK
AU  - Heller,Robert
AU  - Bryne,John
AU  - Kaufmanis,Karlis
AU  - Ojakangas,Richard
AU  - Renaud,Jane Wooten
TI  - Earth science
T2  - Challenges to science
SN  - 0070280371
AV  - QE29.27 EAR
PY  - 1972///
CY  - New York
PB  - Webster Division, McGraw-Hill
KW  - Earth sciences
KW  - Juvenile literature
KW  - Astronomy
N1  - Includes bibliographic reference and index
ER  -