deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 90d6d92..8126a15 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
...
pages = {1--49},  month = {apr},  }  @article{Quirk:1991uq,  author = {Quirk, David G},  title = {{Origin of the Peak District Orefield}},  journal = {Bulletin of the Peak District Mines Historical Society},  year = {1991},  volume = {12},  number = {13},  pages = {4--15},  }