TY  - RPRT
TI  - The inverse problem of refraction travel times, part I: Types of Geophysical Nonuniqueness through Minimization
AU  - J. Ivanov
AU  - R. D. Miller
AU  - J. Xia
AU  - D. Steeples
AU  - C.B. Park
PY  - 2005
DO  - 10.1007/s00024-004-2615-1
UR  - https://pubs.usgs.gov/publication/70028767
ID  - 70028767
ER  -