?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=del+Valle%2C+Diego+Hern%C3%A1n&rft.aulast=del+Valle&rft.aufirst=Diego+Hern%C3%A1n&rft.degree=Masters&rft.title=Plan+de+cierre+conceptual+de+mina+superficial+en+el+Departamento+de+los+Andes%2C+Provincia+de+Salta%2C+Rep%C3%BAblica+Argentina&rft.date=27+Julio+2022