Geophagy and micronutrient supplementation in the Ngorongoro Conservation Area, Tanzania, with particular reference to selenium, cobalt & molybdenum.

Mills AJ & Milewski AV. 2007. Geophagy and micronutrient supplementation in the Ngorongoro Conservation Area, Tanzania, with particular reference to selenium, cobalt & molybdenum. Journal of Zoology 271:110–118.