View of A CONCEPT OF AN INTEGRATED GEODATABASE FOR SURFACE WATER, SOIL AND GROUNDWATER POLLUTION WITH ARSENIC IN THE UPPER PART OF OGOSTA VALLEY, NORTHWESTERN BULGARIA | European Journal of Geography

← A CONCEPT OF AN INTEGRATED GEODATABASE FOR SURFACE WATER, SOIL AND GROUNDWATER POLLUTION WITH ARSENIC IN THE UPPER PART OF OGOSTA VALLEY, NORTHWESTERN BULGARIA