Epochæ celebriores, astronomis, historicis, chronologis, Chataiorvm, Syro-Græcorvm Arabvm, Persarvm Chorasmiorvm, usitatæ [electronic resource] / ex traditione Ulug Beigi, Indiæ citra extráque Gangem principis ; eas primus publicavit, recensuit et commentariis illustravit Johannes Gravius