https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Luja%20Alvarado%2C%20Luis%20Ram%C3%B3n%2C%20%22&sort_by=relevance&format=rss 4 0 50 ISBN: https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=73853 By Luja Alvarado, Luis Ramón..
México : Instituto Politécnico Nacional, 1996 .
202 p.

]]> https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=73853 ISBN: https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=154239 México : Instituto Politécnico Nacional, 1996 .
153 p.

]]> https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=154239 ISBN: https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=156108 By Luja Alvarado, Luis Ramón..
México, D.F. : Instituto Politécnico Nacional, 1996 .
397 p.

]]> https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=156108 ISBN: https://biblioteca.usam.edu.sv/cgi-bin/koha/opac-detail.pl?biblionumber=156284 By Luja Alvarado, Luis Ramón..
México, D.F. : Instituto Politécnico Nacional, 1996 .
171 p.

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