1 files changed, 2 insertions, 0 deletions
diff --git a/TODO.md b/TODO.md
index 2d5ed42..183525d 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,6 +3,8 @@ KBART registry:
 - https://sites.google.com/site/kbartregistry/
 - Project Muse as a Keeper?
 
+why did ISSN-L list have bad single line (1300-350X)?
+
 x wikidata update
 x SIM max-year limit
 - handle no-issn dblp containers (?)