TY  - RPRT
TI  - Improved phase-ellipse method for in-situ geophone calibration
AU  - Huaibao P. Liu
AU  - L. Peselnick
PY  - 2006
DO  - 10.1111/j.1365-2478.1986.tb00480.x
UR  - https://pubs.usgs.gov/publication/70014666
ID  - 70014666
ER  -