Indoor 222Rn concentrations in a probability sample of 43,000 houses across 30 states
White, S.B., Bergsten, J.W., Alexander, B.V., Rodman, N.F., and Phillips, J.L., 1992, Indoor 222Rn concentrations in a probability sample of 43,000 houses across 30 states: Health Physics, v. 62, no. 1, p. 41-50.