1. Anomalies in concentrations of radon in the earth;Fleischer,1979
2. Measurements of the effects of atmospheric variables on Rn-222 flux and soil-gas concentrations;Kraner,1964
3. Mercury vapor and other volatile components in the air as guides to ore deposits;McCarthy;J. Geochem. Explor.,1972
4. Mercury in soil-gas and air - A potential tool in mineral exploration;McCarthy;U.S. Geol. Survey, Circular,1969
5. Mercury detection by means of thin gold films;McNerney;Science,1973