TY - JOUR A1 - Drews, R. A1 - Eisen, O. A1 - Weikusat, I. A1 - Kipfstuhl, S. A1 - Lambrecht, A. A1 - Steinhage, D. A1 - Wilhelms, F. A1 - Miller, H. T1 - Layer disturbances and the radio-echo free zone in ice sheets JO - The Cryosphere J1 - TC VL - 3 IS - 2 SP - 195 EP - 203 Y1 - 2009/08/25 PB - Copernicus Publications SN - 1994-0424 UR - http://www.the-cryosphere.net/3/195/2009/ L1 - http://www.the-cryosphere.net/3/195/2009/tc-3-195-2009.pdf DO - 10.5194/tc-3-195-2009 ER -