deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 76c0285..b0e5ab1 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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volume = {69},  year = {1974},  }  @book{jackson08social,  author = {Jackson, Matthew O.},  title = {Social and Economic Networks},  year = {2008},  isbn = {0691134405, 9780691134406},  publisher = {Princeton University Press},  address = {Princeton, NJ, USA},  }