deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 1cd72a7..8a3fd69 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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number={1},  pages={21},  year={2007},  publisher={University of South Alabama} Alabama},  url = {http://www.jdso.org/volume3/number1/Rica_update.pdf},  }  @article{Porter1996,