Map of Bi-214 from airborne radiometric data for Nevada (data from the National Uranium Resource Evaluation)
Graphic by NBMG 1993
Map of Bi-214 from airborne radiometric data for the lower 48 states (data from the National Uranium Resource Evaluation)
Graphic by NBMG 1993
U.S. EPA's radon zones based on counties in Nevada
Graphic by NBMG 1993
