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7/21/2019 subnnn
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file:///C:/Users/Varovsky/Downloads/cta/blast/Methods_for_Underground_Mining.pdfhttp://www.mineriacatamarca.gob.ar/LinkEducativo/InformacionAcademica/Lopez_Gimeno/11_Explosivos_industriales.pdfhttps://www.google.com.pe/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0CDsQFjAGahUKEwidzaDst83IAhXK0IAKHdI5CQM&url=https%3A%2F%2Fbsgrupo.com%2Fmineria%2FCurso-Perforacion-y-Voladura-de-Rocas-294&usg=AFQjCNEwNqIL1UcOkgtjbGlS-FB5P0LqFghttp://intrawww.ing.puc.cl/siding/public/ingcursos/cursos_pub/descarga.phtml?id_ curso_ic=1574&id_archivo=52124http://bibliogeo.ing.ucv.ve/cgi-win/be_alex.cgi?Documento=T041500007781/0&Nombrebd=bfiegucv&CodAsocDoc=630&t03=&t04=132&t05=pnghttp://repositorio.uchile.cl/tesis/uchile/2011/cf-montecino_nb/pdfAmont/cf-montecino_nb.pdfhttp://bibliogeo.ing.ucv.ve/cgi-win/be_alex.cgi?Documento=T041500007276/0&Nombrebd=bfiegucv&CodAsocDoc=128&t03=&t04=164&t05=pnghttps://www.upct.es/~minaeees/topografia_minera.pdfhttps://www.rocscience.com/documents/hoek/corner/Practical-Rock-Engineering-Full-Text.pdf
http://www.aimecuador.org/articulos_archivos_pdf/paper_iv_sefe.pdfhttp://oa.upm.es/14966/1/PDF_JAVIER_BONILLA_RUIZ_DE_VALDIVIA.pdf