Referenced in:

• ed: 69 - Cambridge, Corpus Christi College, 221, fols. 1-24 [Alcuin, De orthographia, coll. as C]
• mss: 69 - Cambridge, Corpus Christi College, 221, fols. 1-24 xxxiii
• ed: 438 - London, British Library, Harley 3826 [Alcuin, De orthographia, coll. as H]
• mss: 438 - London, British Library, Harley 3826 xxxiv
• st: 438 - London, British Library, Harley 3826 xliv-xlvi [relation to no. 69]