diff --git a/03-supplementary_data/lib.bib b/03-supplementary_data/lib.bib
index ac7627f..f4835d2 100644
--- a/03-supplementary_data/lib.bib
+++ b/03-supplementary_data/lib.bib
@@ -1,3 +1,67 @@
+@techreport{ilo2023,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['definitions']},
+  title = {Guidelines concerning a statistical definition of informal employment},
+  year = {2023},
+}
+
+@techreport{ilo2021,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['definitions']},
+  title = {Inequalities and the world of work},
+  year = {2021},
+}
+
+@techreport{ilo2021a,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['definitions']},
+  title = {Resolution concerning inequalities and the world of work},
+  year = {2021},
+}
+
+@techreport{ilo2022,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['policy']},
+  title = {Follow-up to the resolution concerning inequalities and the world of work: Comprehensive and integrated ILO strategy to reduce and prevent inequalities in the world of work},
+  year = {2022},
+}
+
+@techreport{ilo2013,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['definitions']},
+  title = {Resolution concerning statistics of work, employment and labour underutilization},
+  year = {2013},
+}
+
+@techreport{ilotrends2022,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['gender', 'spatial', 'income']},
+  title = {World Employment and Social Outlook: Trends 2022},
+  year = {2022},
+}
+
+@techreport{ilowomen2016,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['gender', 'income']},
+  title = {Women at Work Trends 2016},
+  year = {2016},
+}
+
+@techreport{ilodomestic2023,
+  author = {ILO},
+  institution = {International Labour Organization},
+  tags = {['domestic']},
+  title = {The road to decent work for domestic workers},
+  year = {2023},
+}
+
 @techreport{ilo2015,
   address = {International Labour Office, Geneva},
   author = {ILO},
@@ -13,55 +77,6 @@
   year = {2002},
 }
 
-@techreport{ilo2023,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {Guidelines concerning a statistical definition of informal employment},
-  year = {2023},
-}
-
-@techreport{ilo2021,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {Inequalities and the world of work},
-  year = {2021},
-}
-
-@techreport{ilo2021a,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {Resolution concerning inequalities and the world of work},
-  year = {2021},
-}
-
-@techreport{ilo2022,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {Follow-up to the resolution concerning inequalities and the world of work: Comprehensive and integrated ILO strategy to reduce and prevent inequalities in the world of work},
-  year = {2022},
-}
-
-@techreport{ilo2013,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {Resolution concerning statistics of work, employment and labour underutilization},
-  year = {2013},
-}
-
-@techreport{ilotrends2022,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {World Employment and Social Outlook: Trends 2022},
-  year = {2022},
-}
-
-@techreport{ilodomestic2023,
-  author = {ILO},
-  institution = {International Labour Organization},
-  title = {The road to decent work for domestic workers},
-  year = {2023},
-}
-
 @techreport{ilotrends2023,
   author = {ILO},
   institution = {International Labour Organization},
@@ -76,9 +91,9 @@
   year = {2019},
 }
 
-@techreport{ilowomen2016,
+@techreport{ilo22countrygroupings,
   author = {ILO},
-  institution = {International Labour Organization},
-  title = {Women at Work Trends 2016},
-  year = {2016},
+  title = {Country grouping},
+  url = {https://ilostat.ilo.org/resources/concepts-and-definitions/classification-country-groupings/},
+  year = {2022},
 }
\ No newline at end of file