BIBLIOGRAPHY CONTRIBUTOR Wilhelm Barthold First name Wilhelm Last name Barthold Bibliography entries by this contributor Barthold, Wilhelm. 1973. “Abu'l-Ḥasan Beyhaqī”. In Sochineniya, 8:586-587. Barthold, Wilhelm. 1963. Four Studies On The History Of Central Asia. Vol. 2: Ulugh Beg. Leiden: E. J. Brill. Barthold, Wilhelm. 1913. “Abu'l-Ḥasan ʿAlī Baihaqī”. In Encyclopaedia Of Islam, 1:592.