TY - GEN AU - Crawford,D J TI - The radiological impact of 219Rn and its effect on 222Rn risk assessment SN - 0017-9078 PY - 1981///1118 KW - Air Pollution, Radioactive KW - analysis KW - Protactinium KW - Radon KW - Risk KW - Soil Pollutants, Radioactive N1 - Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S ER -