TY  - RPRT
TI  - Evidence for deep mantle circulation from global tomography
AU  - R. D. Van Der Hilst
AU  - S. Widiyantoro
AU  - E.R. Engdahl
PY  - 1997
DO  - 10.1038/386578a0
UR  - https://pubs.usgs.gov/publication/70019882
ID  - 70019882
ER  -