TY  - RPRT
TI  - Nonlinear refraction and reflection travel time tomography
AU  - Jiahua Zhang
AU  - Uri S. ten Brink
AU  - M.N. Toksoz
PY  - 1998
DO  - 10.1029/98jb01981
UR  - https://pubs.usgs.gov/publication/70020207
ID  - 70020207
ER  -