Marta Avila, Gustavo Perez, Mouhsine Esshaimi, Laila Mandi, Naaila Ouazzani, Jose L. Brianso and Manuel Valiente, 2012, Heavy Metal Contamination and Mobility at the Mine Area of Draa Lasfar (Morocco). The Open Environmental Pollution & Toxicology Journal, 2012, 3, (Suppl 1-M2) 2-12