TY - T1 - Seismic activity related to the 1991 Hekla eruption, Iceland SN - / UR - URN:ISBN:951-45-7998-4; http://hdl.handle.net/10138/21216 T3 - A1 - Soosalu, Heidi A2 - PB - Helsingin yliopisto Y1 - 2004 LA - en AB - ... VO - IS - SP - OP - KW - N1 - PP - ER -