GETMAG - a SQUID Magnetic Tensor Gradiometer for Mineral and Oil Exploration Schmidt, Phillip ; Clark, David ; Leslie, Keith ; Bick, Marcel ; Tilbrook, David ; Foley, Cathy Abstract Publication: Exploration Geophysics Pub Date: December 2004 DOI: 10.1071/EG04297 Bibcode: 2004ExG....35..297S