deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index b3b4da1..039baa1 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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title = {{Introduction to Solid State Physics}},  journal = {Am. J. Phys.},  }  @incollection{2013,  year = {2013},  publisher = {TeachSpin},  title = {{Earth's-Field Nuclear Magnetic Resonance}},  booktitle = {Operating Manual},  }