Crustal and upper mantle electrical conductivity structures in West Africa : geodynamic implications /Ritz, Michel Robineau, B. CROUTE CONTINENTALE SONDAGE MAGNETIQUE PROFOND BASSIN SEDIMENTAIRE CRATON GEOLOGIE RESISTIVITE LITHOSPHERE MANTEAU GEODYNAMIQUE 1986 text https://www.documentation.ird.fr/hor/fdi:010014512 fdi:010014512 Ritz Michel, Robineau B.. Crustal and upper mantle electrical conductivity structures in West Africa : geodynamic implications. 1986, 124, 115-132 EN SENEGAL ORIENTAL