URL: 200.48.26.79/bi ... http://200.48.26.79/bibvirtual/publicaciones/escr_y_pensN1/escritu1.htm
URL: sisbib.unmsm.ed ... http://sisbib.unmsm.edu.pe/bibvirtual/publicaciones/Escrip̲ensam/Portada.htm
URL: revistasinvesti ... http://revistasinvestigacion.unmsm.edu.pe/index.php/letras
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/oxofrs7m3fgp7mhdpovgswebpi
URL: 200.48.26.79/bi ... http://200.48.26.79/bibvirtual/publicaciones/escr_y_pensN1/escritu1.htm
URL: sisbib.unmsm.ed ... http://sisbib.unmsm.edu.pe/bibvirtual/publicaciones/Escrip̲ensam/Portada.htm
URL: revistasinvesti ... http://revistasinvestigacion.unmsm.edu.pe/index.php/letras
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/oxofrs7m3fgp7mhdpovgswebpi
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%221609-9109%22
Bing: www.bing.com/se ... https://www.bing.com/search?q=ISSN+%221609-9109%22
Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%221609-9109%22
CROSSREF: search.crossref ... https://search.crossref.org/?q=+1609-9109