TY - JOUR A1 - Drews, R. A1 - Eisen, O. A1 - Hamann, 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 Discuss. J1 - TCD VL - 3 IS - 1 SP - 307 EP - 321 Y1 - 2009/04/28 PB - Copernicus Publications SN - 1994-0440 UR - http://www.the-cryosphere-discuss.net/3/307/2009/ L1 - http://www.the-cryosphere-discuss.net/3/307/2009/tcd-3-307-2009.pdf DO - 10.5194/tcd-3-307-2009 ER -