TY  - BOOK
AU  - Heller,R.O...(Et Al)
TI  - Earth science
T2  - Challenges to science
SN  - 0070280371
PY  - 1979///
CY  - New York
PB  - Mcgraw-Hill
KW  - Earth sciences
KW  - Astronomy
KW  - sears
N1  - Includes glossary and index
ER  -