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BioDiversity
Ingram, G.B., and J.T.Williams. 1984. In situ conservation of wild relatives of crops. Pp. 163–179 in J.H.W.Holden and J.T.Williams, eds. Crop Genetic Resources: Conservation and Evaluation. Allen and Unwin, London.
Lester, R.N., J.J.G.Hakiza, N.Stavropoulos, and M.M.Teixiera. 1986. Variation patterns in the African scarlet eggplant. Pp. 283–308 in B.T.Sytles, ed. Infraspecific Classification of Wild and Cultivated Plants. Clarendon Press, Oxford.
Vavilov, N.I. 1951. The origin, variation, immunity and breeding of cultivated plants. Chronica Bot. Volume 13. 364 pp.
Williams, J.T. 1982. International programs with special reference to genetic conservation and the role of the United States. Pp. 52–55 in Proceedings of the U.S. Strategy Conference on Biological Diversity 1981. Publication No. 9262. U.S. Department of State, Washington, D.C.
Williams, J.T. 1984. A decade of crop genetic resources research. Pp. 1–17 in J.H.W.Holden and J.T.Williams, eds. Crop Genetic Resources: Conservation and Evaluation. Allen and Unwin, London.
Zhukovsky, P.M. 1975. Mega-genecenters and Endemic Micro-genecenters: World Gene Pool of Plants for Breeding. USSR Academy of Sciences, Leningrad. 116 pp.