@inbook {1541,
	title = {Natural hybridization between Xenopus laevis laevis and X. gilli in the south-western Cape Province, South Africa},
	booktitle = {Tinsley, R.C., and H.R. Kobel, eds. The Biology of Xenopus. Symposia of the Zoological Society of London 68.},
	year = {1996},
	pages = {61-71},
	address = {Clarend on Press, Oxford, UK},
	author = {Picker, M.D. and J.A. Harrison and Wallace, D.}
}
