1. On microearthquakes having accompanied aftershocks of the Hukui earthquake of June 28, 1948;Asada;Geophys. Notes, Tokyo Univ. 2,1949
2. On microearthquakes observed after the Imaichi earthquake, Dec. 26, 1949;Asada;Bull Earthq. Res. Inst., Univ. Tokyo,1950
3. Principles and applications of microearthquake networks;Lee,1981-1981
4. Acoustic Emission, proc. of 1st Conf. on Acoustic Emission/Microseismic Activity in Geologic Structures and Materials;Hardy,1977
5. Acoustic Emission II, Proc. of 2nd Conf. on Acoustic Emission/Microseismic Activity in Geologic Structures and Materials;Hardy,1980