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evolucion de la luz
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INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/BrassOliveOilLamp2.jpg/220px-BrassOliveOilLamp2.jpg" \* MERGEFORMATINET
Lmpara de aceite
Lmpara de queroseno
Lmpara de carburo
700018001900
8000 a.c