The map of ancient underground aqueducts_ a nation-wide project by the Italian Speleological Society
	
        
            PARISE M., BIXIO R., BURRI E., CALOI V., DEL PRETE S., GALEAZZI C., GERMANI C., GUGLIA P., MENEGHINI M., &  SAMMARCO M., 2009, The map of ancient underground aqueducts_ a nation-wide project by the Italian Speleological Society,
            15th International Congress of Speleology, Kerrville, Texas, USA, 2009,
            URL: http://www.cnr.it/prodotto/i/88916
        
        
                    
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