TY  - BOOK
AU  - Krebs, Robert E. 
TI  - The basics of earth science
T2  - Basics of the Hard Sciences
SN  - 313319308
PY  - 2007///
CY  - New Delhi
PB  - Atlantic
KW  - BiosphereEarth ScienceEarth's ResourcesEarth's StructureHydrosphereWeather
ER  -