TY  - BOOK
AU  - SPENCER, EDGAR W
TI  - INTRODUCTION TO THE STRUCTURE OF THE EARTH
T2  - 0
SN  - 0-70-060197-6
U1  - 525 
PY  - 1977///
CY  - U.S.A.
PB  - MCGRAW-HILLBOOK COMPANY
KW  - CIENCIAS PURAS
N1  - PRINCIPLES/TECTONICS
ER  -