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https://www.nationalacademies.org/publications/5739 Toxicologic Assessment of the Army's Zinc Cadmium Sulfide Dispersion Tests | The National Academies... During the 1950s and 1960s, the U.S. Army conducted atmospheric dispersion tests in many American cities using fluorescent particles of zinc cadmium sulfi... zinc cadmium sulfide https://www.ncbi.nlm.nih.gov/books/NBK233506/ Introduction - Toxicologic Assessment of the Army's Zinc Cadmium Sulfide Dispersion Tests - NCBI... Because of widespread concern over possible use of biologic warfare (BW) by a foreign power against the United States and its allies, President Roosevelt in... zinc cadmium sulfide