Don't have Telegram yet? Try it now!
https://santricendekia.com/sekilas-tentang-buku-mutamar-tauhid-at-taqwim-al-hijry-al-muwahhad/
Kitab Tauhid at-Taqwim al-Hijry al-Muwahhad, Risalah Penyatuan Kalender Islam Global