@Book{BVMC:1054253,
author = {Abū Maʻšar al-Balh̲ī, Ğaʻfar ibn Muḥammad ibn ʻUmar},
author = {Hermann de Carintia},
title = {Introductorium in astronomiam},
url = {https://www.cervantesvirtual.com/obra/introductorium-in-astronomiam-1054253}
}