TY  - BOOK
AU  - Spencer, Edgar Winston
TI  - The dynamics of the earth : : an introduction to physical geology
SN  - 0-690-24844-X
AV  - GY QE28.2.S64 
PY  - 1972///
CY  - New York : 
PB  - Thomas Y. Crowell Company
KW  - Physical geology
ER  -