?url_ver=Z39.88-2004&rft_id=10.20868%2FUPM.book.21848&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Bernaola+Alonso&rft.au=Bernaola+Alonso%2C+Jos%C3%A9&rft.aufirst=Jos%C3%A9&rft.btitle=Perforaci%C3%B3n+y+voladura+de+rocas+en+miner%C3%ADa.&rft.tpages=264&rft.date=7+October+2013&rft.genre=book