TY  - BOOK
AU  - Spencer, Edgar W.
TI  - Introduction to the structure  of the Earth
SN  - 0070601976
U1  - 551.1 
PY  - 1977///
CY  - New Delhi: 
PB  - Mc Grawhill, 
KW  - Earth Science
KW  - Geology
KW  - Orogen
KW  - Tectonics
ER  -