TY  - BOOK
T1  - Unstable ground in western North Dakota /
DA  - 1979.
CY  - Arlington, Va. :
AU  - Trimble, Donald E.
VL  - 798
CN  - QE75
CN  - QE75
PB  - Branch of Distribution, U.S. Geological Survey,
PP  - Arlington, Va. :
PY  - 1979.
ID  - 227204
KW  - Landslides
KW  - Subsidences (Earth movements)
TI  - Unstable ground in western North Dakota /
ER  -