02.30.00 Subsurface Investigation

02.31.00 Geophysical Investigations

02.31.13 Seismic Investigations 02.31.16 Gravity Investigations 02.31.19 Magnetic Investigations 02.31.23 Electromagnetic Investigations 02.31.26 Electrical Resistivity Investigations 02.31.29 Magnetotelluric Investigations

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