Census of the Petrarch Manuscripts in the United States
Wellesley, Mass., Wellesley College Library: Plimpton 808(Richard of Middleton, In librum secundum Sententiarum ) (Tomasini, no. 62; Arrigoni, no. X; De Ricci, Census I, p. 1075, no. 808; Ullman, no. 90).1
1. M. H. Jackson, Catalogue of the Frances Taylor Pearsons Plimpton Collection...in the Library of Wellesley College (Cambridge Mass., 1929), 420-22.
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