?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Berrezueta&rft.au=Berrezueta%2C+Edgar&rft.aufirst=Edgar&rft.title=A+low+cost+and+widely+applicable+methodology+of+digital+imagen+analysis+of+ores+for+mineral+and+envirommental+engineering&rft.btitle=Proceedings+32%E2%81%BF%E2%82%AB+International+Geological+Congress%2C+Florence%2C+Italy&rft.date=2004&rft.genre=proceeding