https://www.blm.gov/programs/energy-and-minerals/helium/federal-helium-program
https://geology.com/articles/helium/
https://www.usgs.gov/centers/national-minerals-information-center/helium-statistics-and-information
https://pubs.er.usgs.gov/publication/sir20215085
https://www.sciencebase.gov/catalog/item/609e8fe1d34ea221ce3f39e6
Leave a comment