Natalicia augustissimi regis Friderici Guilelmi IIII Universitatis Fridericianae Guilelmiae Rhenanae ... die XV mensis octobris anni MDCCCLVII ... ex officio indicit Fridericus Ritschelius - Brandis, J. (Johannes), 1830-1873; Ritschl, Friedrich Wilhelm, 1806-1876 (Litterae Caroli Georgii, 1886)