TY  - BOOK
ED  - Open University.
TI  - The origin of the earth ( motion picture): its structure and composition
PY  - 1972///
CY  - Milton Keynes
PB  - Open University
KW  - Earth
KW  - Crust
KW  - Origin
KW  - Surface
N1  - Illustrates the structure and physical properties of the Earth's crust and upper mantle as determined mainly by seismology and gravity; backup in U-matic
ER  -