RT Journal Article SR Electronic(1) A1 Fromyr, E. A1 Cambois, G. A1 Long, A. A1 Parkes, G. A1 Lundsten, T. A1 Mattsson, A.YR 2009 T1 Multi-level Airgun Array – A Simple and Effective Way to Enhance Low Frequencies in Marine Seismic JF , VO OP SP cp-127-00264 DO https://doi.org/10.3997/2214-4609.201400271 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201400271