Diet and gender in the Tiwanaku colonies: Stable isotope analysis of human bone collagen and apatite from Moquegua, Peru Sarah Raubenheimer, Linda Yzurdiaga, Karin L. Bruwelheide, P.S. Goldstein, A.C. Dahlstedt, S.I. Baitzel, A.D. Somerville, K.J. Knudson, M.J. Schoeninger • 2015