1. Spectral reflectance of lichens and their effects on the reflectance of rock substrates;Ager;Geophysics,1987
2. Geomathematical evaluation of copper and zinc potential of the Abitibi Area, Ontario and Quebec;Agterberg;Geol. Surv. Can. Paper 71-41,1972
3. Cartografa digital des rocas en el área Albuquerque-La Codosera, Extremadura, utilizando imágenes Landsat Thematic Mapper, III;Antón Pacheco,1989
4. Internal Reports;Billiton International Metals,1980
5. Weathering of chlorite and vermiculite in ultramafic rocks of Cabo Ortegal, Northwestern Spain;Buurman;Clays Clay Miner,1988