1. STUDY ON THE PHYSICOCHEMICAL AND CHEMICAL PARAMETERS OF DRINKING AND SURFACE WATERS FROM MINE AREA AT VILLAGE BOV, BALKAN MOUNTAIN, BULGARIA. Authors: ALBENA PREDOEVA, GALIA GENTSCHEVA, IRINA KARADJOVA, METODI MLADENOV.2. DETERMINATION OF THE COMPOSITION AND CONTAMINATION WITH HEAVY METALS OF SOILS FROM THE SREBARNA LAKE RESERVE. Authors: METODI MLADENOV, SPASKA YANEVA.