Update textbook.en.md

5 years ago · f5c9279f71
1 changed files with 3 additions and 0 deletions
--- a/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/10.main/textbook.en.md
+++ b/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/10.main/textbook.en.md
@ -3,6 +3,9 @@ title: Cylindrical coordinates
 published: true
 routable: false
 visible: false
+lessons:
+    - slug: cylindrical-coordinates-linear
+      order: 1
 ---