A catalogue of the mineral species in the National Museum of Natural History, Sofia (Part 1) Native elements, Sulphides and Sulphosalts, Oxides and Hydroxides, HalogenidesAuthors: Chavdar Karov | Iliya DimitrovPublished in Historia naturalis bulgarica, in 2002, in volume 15, pages 5-29Created: 2016-09-16, modified: 2016-09-16