1. A liquid mercury pendulum seismograph. (Abstr.);Benioff;Trans. Am. Geophys. Union,1965
2. Geodesy;Bomford,1962
3. Crustal strain and microseismicity investigations at the National Center for Earthquake Research of the United States Geological Survey;Burford,1968
4. Deformation measurements on Kilauea Volcano, Hawaii;Decker;Bull. Volcanol.,1966
5. An accurate Invar-wire extensometer;Duffield;J. Res. U.S. Geol. Surv.,1973