@misc{indiciae14f3300cfffe,
  title = {A discussion of geology, soils, wines, and history of the Napa Valley region},
  author = {David G. Howell and Jonathan P. Swinchatt},
  year = {2000},
  doi = {10.1130/0-8137-0002-7.415},
  url = {https://pubs.usgs.gov/publication/70073919},
  note = {Source identifier: 70073919}
}