From e5b9bce79b68a68ddd2e51daa16d2fea73b84fdb Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Wed, 19 Oct 2022 20:03:25 +0200
Subject: Polish presentation, "fix" Unicode sorting

---
 source/know/concept/ion-sound-wave/index.md | 1 +
 1 file changed, 1 insertion(+)

(limited to 'source/know/concept/ion-sound-wave')

diff --git a/source/know/concept/ion-sound-wave/index.md b/source/know/concept/ion-sound-wave/index.md
index 48a727d..622605c 100644
--- a/source/know/concept/ion-sound-wave/index.md
+++ b/source/know/concept/ion-sound-wave/index.md
@@ -1,5 +1,6 @@
 ---
 title: "Ion sound wave"
+sort_title: "Ion sound wave"
 date: 2021-10-31
 categories:
 - Physics
-- 
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