Rasa'ilu'l-Biruni : containing Four tracts : based on the Unique Compendium of Mathematical and Astronomical treatises in the Oriental Public Library, Bankipore (Arabic Ms. 2468/42, 36, 38, 37) - Al-Biruni (The Dairatu'l-Ma'arif-il-Osmania = Osmania Oriental Publications Bureau, 1948)