?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Enrique&rft.au=Alarc%C3%B3n+%C3%81lvarez%2C+Enrique&rft.aulast=Alarc%C3%B3n+%C3%81lvarez&rft.title=Identification+of+pressures+and+maintenance+in+railway+tunnels&rft.btitle=Computational+Methods+and+Experimental+Measurements+%3A+Proceedings+of+the+International+Conference%2C+Washington+DC%2C+July+1982&rft.date=July+1982&rft.isbn=3-540-11648-6&rft.tpages=11&rft.genre=proceeding