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<![CDATA[Biblioteca Univ. Surcolombiana Search for '(su,complete-subfield:{Groundwater}) AND (su,complete-subfield:{Pollution}) AND (su,complete-subfield:{Mathematical models.})']]> https://biblioteca.usco.edu.co//cgi-bin/koha/opac-search.pl?q=ccl=%28su%2Ccomplete-subfield%3A%7BGroundwater%7D%29%20AND%20%28su%2Ccomplete-subfield%3A%7BPollution%7D%29%20AND%20%28su%2Ccomplete-subfield%3A%7BMathematical%20models.%7D%29&format=rss2 0 20