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: 139-48.