From c4a96a00ffb5bcdee35ee36967e4da836ca58ed1 Mon Sep 17 00:00:00 2001
From: Martin Czygan <martin.czygan@gmail.com>
Date: Sat, 15 May 2021 00:31:00 +0200
Subject: notes on urls

---
 python/notes/version_3.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/python/notes/version_3.md b/python/notes/version_3.md
index 66840bf..c2cdc60 100644
--- a/python/notes/version_3.md
+++ b/python/notes/version_3.md
@@ -302,3 +302,9 @@ So maybe 500k isbn in total?
 
 * need to find them, then validate them
 
+----
+
+## Notes on URLList
+
+* about 25M urls
+* about 11075871 seem to have a "doi"
-- 
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