TY  - BOOK
AU  - Gass,I.G.
AU  - Smith,Peter J.
AU  - Wilson,R.C.L.
ED  - Open University.
TI  - Understanding the Earth: a reader in the earth sciences 
U1  - 550 22
PY  - 1971///
CY  - Sussex
PB  - The Artemis Press
KW  - Earth sciences
N1  - "An Open University book."; Prepared for the Open University's Foundation course in science; Includes bibliographical references
ER  -