@misc{indiciae11cf51fd4be2,
  title = {Tomographic imaging of subducted lithosphere below northwest Pacific island arcs},
  author = {R. van der Hilst and R. Engdahl and W. Spakman and G. Nolet},
  year = {1991},
  doi = {10.1038/353037a0},
  url = {https://pubs.usgs.gov/publication/70016542},
  note = {Source identifier: 70016542}
}