WITNESS

Risālah fī samt al-qiblah (Aḥmad al-Ghandajānī)_Oxford_Bodleian Library, Oxford Univ._Thurston_3

References

Suzuki, Takanori. 1988. “A Solution Of The Qibla-Problem By Abu'l-Qasim Ahmad Ibn Muhammad Al-Ghandajani”. Zeitschrift Für Geschichte Der Arabisch-Islamischen Wissenschaften 4: 139-148.