"The Summa magna was composed by Hengham sometime after 20 November, 1272, and before 15 April, 1275 ... The Summa parva was not written for over a decade later, sometime after 25 March, 1285, and probably before 2 April, 1290."--Introd.
"Extant mss. of the Summa magna and Summa parva": p. lxxiii-lxxviii.
"Appendix B: The bibliography of the printed editions of the text edited by John Selden": p. [76]-79.
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