<![CDATA[Biblioteca Univ. Surcolombiana Search for '(su,complete-subfield:{Transformaciones de lorentz}) AND (su,complete-subfield:{Problemas, ejercicios, etc.})']]> https://biblioteca.usco.edu.co//cgi-bin/koha/opac-search.pl?q=ccl=%28su%2Ccomplete-subfield%3A%7BTransformaciones%20de%20lorentz%7D%29%20AND%20%28su%2Ccomplete-subfield%3A%7BProblemas%2C%20ejercicios%2C%20etc.%7D%29&format=rss2 0 20