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World War, 1914-1918 --- 623.459 --- 662.164 --- 940.3 --- 662.164 Production of war gases --- Production of war gases --- 940.3 Geschiedenis van Europa: Eerste Wereldoorlog--(1914-1919) (algemeen) --- Geschiedenis van Europa: Eerste Wereldoorlog--(1914-1919) (algemeen) --- Chemical warfare --- Chemische wapens. Oorlogsgassen --- History of Europe --- anno 1910-1919
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623.459 --- 628.394 --- 614.777 --- Chemische wapens. Oorlogsgassen --- Disposal of wastes into natural waters, seas, rivers, lakes. Water pollution --- Water. Hygiene of water --- 614.777 Water. Hygiene of water --- 628.394 Disposal of wastes into natural waters, seas, rivers, lakes. Water pollution --- Chemical weapons --- Waste disposal in the ocean --- Deepwater dumpsites --- Dumping of wastes in the ocean --- Ocean disposal of wastes --- Ocean dumping --- Sea disposal of wastes --- Sea dumping --- Waste disposal at sea --- Waste dumping in the ocean --- Marine pollution --- Refuse and refuse disposal --- Sewage disposal --- Weapons of mass destruction --- Environmental aspects&delete& --- Congresses --- Environmental aspects
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