Alattas, Hassan bin Mohammad Risalah awal Muharram dan hijrah Rasulullah / Syed Hassan bin Mohammad Alattas - Singapore : S.S. Mubaruk, 1984. - 34 pages. ; 21 cm. includes Arabic. Subjects--Topical Terms: Islamic calendarMuhammad, Prophet, d-632 -- Hijrah LC Class. No.: B77.5