唐山7.8级地震前地下水位异常的模糊识别

郑熙铭, 冯德益

THE FUZZY RECOGNITION OF PRECURSORY ANOMALIES OF GROUNDWATER LEVEL BEFORE TANGSHAN M=7.8 EARTHQUAKE

Zheng Xi-ming, Feng De-yi

地震地质 . 1989, (3): 1 -8 .