TY  - RPRT
TI  - Expendable bubble tiltmeter for geophysical monitoring
AU  - J.A. Westphal
AU  - M.A. Carr
AU  - W.F. Miller
AU  - D. Dzurisin
PY  - 1983
DO  - 10.1063/1.1137408
UR  - https://pubs.usgs.gov/publication/70011271
ID  - 70011271
ER  -