Epsomite from
USA | |
| Dana 6: 1069. |
| Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125. |
USA | |
| Dana 6: 1069. |
| Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125. |