TY  - BOOK
AU  - Umbgrove, J. H. F.
TI  - The pulse of the earth
U1  - 550 DDC 21
PY  - 1947///
CY  - The Hague
PB  - Martinus Nijhoff
KW  - Geology
KW  - Earth (Planet)
KW  - Structural geology
KW  - Earth movement
KW  - Geophysics
KW  - Geography
ER  -