@misc{indiciae79369cfe7261,
  title = {Geochemical constraints on possible subduction components in lavas of Mayon and Taal Volcanoes, Southern Luzon, Philippines},
  author = {P.R. Castillo and C. G. Newhall},
  year = {2004},
  doi = {10.1093/petrology/egh005},
  url = {https://pubs.usgs.gov/publication/70026665},
  note = {Source identifier: 70026665}
}