Hematite from Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
Czech Republic | |
| King, Van (n.d.) Personal communcation. |
| Vavřinec L., Noha J.: Brochantit a posnjakit, nové sekundární minerály mědi z Horní Krupky. Časopis pro mineralogii a geologii, 1979, 24, 3, 323-324. |
| www.geocities.com/Smula.geo |
Nový Martin adit, Steinknochen area, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic