6Schoeninger MJ.Reconstructing prehistoric human diet[A].In:Price TD ed.The Chemistry of Prehistoric Hmnan Bone[C].New York:Academic Press,1989:211-229,38-67.
7Ambrose SH.Preparation and characterization bone and tooth collagen for stable carbon and nitrogen isotope analysis[J].Journal of Archaeological Science,1990,17:431-451.
8Price TD,Blitz J,Burton JH.Diagenesis in prehistoric bone:problems and solutions[J].Journal of Archaeological Science,1992,19:513-530.
9DeNiro MJ.Poat-mortem preservation of alteration of in vivo bone collagen isotope ratios in relation to palaeodietary reconstruction[J].Nature,1985,317:806-809.
10O'Leary MH.Carbon isotope fractionation in plants[J].Photochemistry,1981,20(4):553-567.
