jgg     2011 31 (4):  154-159    ISSN: 0412-1961  CN: 21-1139/TG A SPECTRAL INVERSION ALGORITHM FOR GPR SIGNALS OF THIN LAYERS Huang Zhonglai 1) ; Zhang Jianzhong 2) ; and Huang Jilin 1) 1)School of Information Science and Technology, Xiamen University, Xiamen 361005 2)College of Marine Geo-science, Ocean University of China, Qingdao 266100 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null