1. Allergri, L., Bella, F., Della Monica, G., Ermini, A., Improta, S., andBiagi, P. F. (1983),Radon and Tilt Anomalies Detected Before the Irpinia (South Italy) Earthquake of November 23, 1980 at Great Distances from the Epicenter. Geophys. Res. Letters10, 269?272.
2. Everett, S., Johnston, A., Nava, S., andMetzger, A. (1983),The Central Arkansas Earthquake Swarm, Part 2. Tenn. Earthquake Info. Center, Special Report #8, 40 pp.
3. Fleischer, R. L. (1981),Dislocation Model for Radon Response to Distant Earthquakes. Geophys. Res. Letters9, 477?480.
4. Fleischer, R. L., andMogro-Campero, A. (1983),Radon and Distant Earthquakes: Further Correlations from Alaska and a proposal for Diagnostic Observations (abstr.). Eos Trans. Amer. Geophys. Un.64, 757.
5. Gingrich, J. E. (1975),Results from a New Uranium Exploration Method. Trans. Soc. Mining Engin. AIME 258, 61?64.