Glockerite from USA
USA | |
| Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 588. |
| Gordon, Mineralogy of Pennsyvania, 1922 - p. 224 |
Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125. |