Parsons, J.G., de la Rosa, G., Gardea-Torresdey, J.L.. The Study of PM10 and Heavy Metal Concentrations in Environmental Air Samples of Chihuahua City, Mexico. Ciencia en la Frontera, V, 5058. Chromium uptake and speciation by both desert and non-desert plant species. Extended Abstracts presented at the ACS National Meeting, American Chemical Society, Division of Environmental Chemistry 47(1), 989-995. 2007.