The Measurement of Activity-Weighted Size Distributions of Radon Progeny
P. K. Hopke, R. Strydom, M. Ramamurthi, E. O. Knutson, K. W. Tu, P. Scofield, R. F. Holub, Y. S. Cheng, Y. F. Su, W. Winklmayr, J. C. Strong, S. Solomon, A. Reineking
Health Phys. 63, No. 5, pp. 560-570 (November 1992)