Title: Madá al-iʻtimād ʻalá al-ḥisābāt al-falakiyah li-thubūt al-ahillah al-sharʻīyah
Description: Islamic calendar; astronomy; religious aspects; Islam; congresses.
Subjects: Islamic calendar, New moon, Islam, Astronomy, Qurʼan, Religious aspects, Astronomie, Islamischer Kalender, Neumond