Analysis of information sources in references of the Wikipedia article "Hipopótamo de Allenton" in Spanish language version.
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redundantes (ayuda). Consultado el 23 de diciembre de 2010. «In 1896, the author and Mr R.M. Deeley obtained the greater portion of the skeleton of a hippopotamus, together with part of the breast-bone of an elephant and of the femur of a rhinoceros, in the Derwent gravel at Allenton, immediately to the south of Derby. These bones are now in the Museum at Derby.»