???MD_TITLE???:
???Arte de ensayar oro y plata???
???MD_AUTHOR???:
???Sage, Balthazar-Georges???
???MD_PUBLISHER???:
???por don Joachín Ibarra???
???MD_OTHERAUTHOR???:
???Gómez Ortega, Casimiro???
???Ibarra, Joaquín???
???MD_YEARPUBLISH???:
???1785???
???MD_PLACEPUBLISH???:
???Madrid???