Decay and conservation strategies of rocks containing dinosaur footprints: the case of several sites in Spain Author(s): Prada, J.L.; Badia, M.; Àlvarez, A.; Oms, O.; Estrada, R.; Arribas, M.E.Date: 11/06/2009IX Congrés Internacional ASMOSIAParanimf del Rectorat de la URVTarragonaOrganised by: ICAC