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@article {820,
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@article {1502,
	title = {Studies in the reproduction of Xenopus laevis. I. The relation of the external environmental factors to the sexual cycle},
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	year = {1938},
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	author = {Berk, L.}
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@article {1527,
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@article {1501,
	title = {Feeding behaviour of the African clawed frog (Xenopus laevis Daudin): (Amphibia, Anura, Pipidae): effect of prey type},
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	year = {1978},
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	author = {Avila, V.L. and Frye, P.G.}
}
@article {1539,
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	year = {1988},
	pages = {787-791},
	author = {Measey, G.J.}
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@article {1538,
	title = {An observation of reproductive behavior in a wild population of African clawed frogs, Xenopus laevis, in California},
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	year = {1985},
	pages = {245-250},
	author = {McCoid, M.J.}
}
@inbook {1561,
	title = {The biology of Xenopus tadpoles},
	booktitle = {The Biology of Xenopus.},
	series = {Symposia of the Zoological Society of London 68.},
	year = {1996},
	pages = {195{\textendash}211},
	publisher = {Clarendon Press},
	organization = {Clarendon Press},
	address = {Oxford, U.K.},
	author = {Wassersug, R.J.},
	editor = {Tinsley, R.C. and Kobel, H.R.}
}
@article {1361,
	title = {Origin of the amphibian chytrid fungus},
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@mastersthesis {1362,
	title = {Chytridiomycosis, an emerging infectious disease of amphibians in South Africa},
	year = {2005},
	school = {North-West University},
	type = {mastersPhD},
	address = {Potchefstroom, South Africa},
	author = {Weldon, C.}
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@article {897,
	title = {Exploitation of frogs {\textendash} a review with a focus on West Africa},
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	volume = {45},
	year = {2009},
	pages = {193-202},
	author = {Mohneke, M. and Onadeko, A.B. and R{\"o}del, Mark-Oliver}
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