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radiation exposure rate from a radioactive Cs-137 source, radioaktiivsest Cs-137 allikast lähtuv kiirgustase
calibration source of radioactivity . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/calibration%20source%20of%20radioactivity/1/eng (06.08.2026)