References
De Niro, M. J. and Epstein, S. 1978. Influence of diet on the distribution on carbon isotopes in animals. Geoechemica et Cosmochimica Acta 42: 295-406.
Fogel, M. L., Tuross, N. and Owsley, D. 1989. Nitrogen isotope tracers of human lactation in modern and archaeological populations. Annual report of the Director, Geophysical Laboratory, 1988-1989. Washington, DC: Carnegie Institution of Washington.
Katzenberg, M. A. 1992. Advances in stable isotope analysis of prehistoric bones. In Skeletal Biology of Past Peoples: Research Methods, Saunders, S. R. and Katzenberg, M. A. (eds), pp. 105-119. New York: Wiley-Liss.
Keegan, W. F. 1989. Stable isotope analysis of prehistoric diet. In Reconstruction of Life from the Skeleton, Isçan, M. Y. and Kennedy, K. A. R. (eds), pp. 223-236. New York: Alan, R. Liss, Inc.
Richards, M. P. and van Klinken, G. J. 1997. A survey of European human bone stable carbon and nitrogen isotope values. In Archaeological Sciences 1995. Proceedings of a conference on the application of scientific techniques to the study of archaeology, Liverpool, July 1995. Sinclair, A, States, E. and Gowlett, J. (eds), pp. 363-368. Oxford: Oxbow Monograph 64.
Richards, M. P., Mays, S. and Fuller, B. T. 2002. Stable carbon and nitrogen isotope values of bone and teeth reflect weaning age at the Medieval Wharram Percy site, Yorkshire, UK. American Journal of Physical Anthropology 119: 205-210.
Schoeninger, M. and DeNiro, M. J. 1984. Nitrogen and carbon isotopic composition of bone collagen from marine and terrestrial animals. Geoechemica et Cosmochimica Acta 48: 625-639.
Schwartz, H. P. and Schoeninger, M. J. 1991. Stable isotope analyses in human nutritional ecology. Yearbook of Physical Anthropology 34: 283-321.
van der Merwe, N. J. 1982. Carbon isotopes, photosynthesis and archaeology. American Scientist 70: 596- 606.
van der Merwe, N. J., Roosevelt, A. C. and Vogel, J. C. 1981. Isotopic evidence for prehistoric subsistence change at Panama, Venezuela. Nature 292: 536-538.
Vogel, J. C. and van der Merwe, N. J. 1977. Isotopic evidence for early maize cultivation in New York State. American Antiquity 42: 238-242.

