Heulandite Subgroup from
USA | |
| Cole, D.R., Ravinsky, L.I. (1984) Hydrothermal alteration zoning in the Beowawe geothermal system, Eureka and Lander counties, Nevada. Economic Geology: 79(4): 759–767. |
| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |