https://napavalleyregister.com/community/calistogan/news/growers-vintners-share-oral-histories-of-st-helena-s-spring/article_396dcc79-4242-5981-8678-b3b44d3ea9bf.html
https://www.wineinstitute.org/files/AVA/Final%20Rules/Spring%20Mountain%20Final%20Rule.pdf
https://ot-process2.sdsc.edu/potree/index.html?r=%22https://ot-process2.sdsc.edu/appEntwineEPTService1575600681638188299501/pc1575600671155%22
https://www.ttb.gov/images/pdfs/Spring_Mountain_District_petition.pdf
https://ceqanet.opr.ca.gov/2018038286