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USA | |
| Smith, R. C. II (1977) Zinc and lead occurrences in Pennsylvania. Mineral Resource Report M72. Pennsylvania Geological Survey |
| Plumlee, Geoffrey S., Whitehouse-Veaux, Pamela Heald (1994) Mineralogy, paragenesis, and mineral zoning of the Bulldog Mountain vein system, Creede District, Colorado. Economic Geology, 89 (8). 1883-1905 doi:10.2113/gsecongeo.89.8.1883 1 August 1971 v. 66 no. 5 p. 777-791 |
| Smith, R. C. II (1977) Zinc and lead occurrences in Pennsylvania. Mineral Resource Report M72. Pennsylvania Geological Survey |
| The Mineralogy of Pennsylvania 1966-1975 Robert C. Smith Pg. 245, Table 30 |