1.
Geophysical approach of Pb-Zn mineralization of the Verviers synclinorium (Belgium) ; Approche géophysique des minéralisations Pb-Zn du synclinorium de Verviers (Belgique)
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8.
Geophysical Investigation of the Pb–Zn Deposit of Lontzen–Poppelsberg, Belgium
Geophysical Investigation of the Pb-Zn deposit of Lontzen-Popplsberg, Belgium
Geophysical Investigation of the Pb-Zn deposit of Plombières, Belgium
Geophysical Investigation of the Pb-Zn deposit of Lontzen, Belgium
9.
Electromagnetic survey of the Pb-Zn deposit of Lontzen, Belgium
Electromagnetic Investigation of the Pb-Zn deposit of Lontzen, Belgium