Kimetsu no Yaiba is published weekly by Shueisha's Weekly Shonen Jump, and collected periodically into tankōbon volumes.
Chapter 7, Kimetsu no Yaiba Wiki
Chapters and Volumes, Kimetsu no Yaiba Wiki
Kimetsu no Yaiba (Anime), Kimetsu no Yaiba Wiki
Volume 20, Kimetsu no Yaiba Wiki
Demon Slayer: Kimetsu no Yaiba (season 1) - Wikipedia
Demon Slayer: Kimetsu no Yaiba (season 2) - Wikipedia
Chapter 53, Kimetsu no Yaiba Wiki
Volume 1, Kimetsu no Yaiba Wiki
Chapter 66, Kimetsu no Yaiba Wiki
Volume 14, Kimetsu no Yaiba Wiki