Panayotova, M. Assessment of the ecologica risk in North-West Bulgaria, cause by water and soul pollution due to oremining and processing activities. София: 1997 p. 10-15,.
Panayotova, M. Assessment of the ecologica risk in North-West Bulgaria, cause by water and soul pollution due to oremining and processing activities. София: 1997 p. 10-15,.
Panayotova, M. (1997) Assessment of the ecologica risk in North-West Bulgaria, cause by water and soul pollution due to oremining and processing activities, София: p. 10-15,.
Panayotova, M. (1997). Assessment of the ecologica risk in North-West Bulgaria, cause by water and soul pollution due to oremining and processing activities. София: p. 10-15.
Panayotova M. Assessment of the ecologica risk in North-West Bulgaria, cause by water and soul pollution due to oremining and processing activities. София: 1997. p. p. 10-15.
