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alpsko-karpatský orogen
Altenberg-Teplice Caldera
alteration
alterations
alternative source models
alterované uhlí
altimetry
alumina fibre
alumina-silicates
alumina wastes
aluminium
aluminium complexes
aluminum
aluminum complexes
amalgamation of blocks
Amatérská Cave
amazonit
ambient noise
ametyst
aminostratigrafie