1. Applications of acoustic emission techniques to rock and rock structures: a state-of-the-art review;Hardy,1981
2. A review of international research relative to the geotechnical field application of acoustic emission/microseismic techniques;Hardy;J Acoust Emission,1989
3. Development of mobile microseismic field equipment;Kimble,1977
4. Microseismic Monitoring of a Longwall Coal Mine: Volume 2 — Determination of Seismic Velocity;Hardy,1978
5. Microseismic Monitoring of a Longwall Coal Mine: Volume 3 — Field Study of Mine Subsidence;Hardy;Final Report, US Bureau of Mines, Grant G0144013,1977