@article {1532,
	title = {Climate and breeding in Xenopus laevis},
	journal = {South African Journal of Science},
	year = {1960},
	pages = {271-276},
	author = {Kalk, M.}
}
@article {1553,
	title = {Interactions between Xenopus species in the southwestern Cape Province, South Africa},
	journal = {South African Journal of Science},
	year = {1985},
	pages = {200},
	author = {Simmonds, M.P.}
}
