JSTOR Ref
Daniel A. Callus Commentarius Cantabrigiensis in Epistolas Pauli e Schola Petri Abaelardi : I. In Epistolam ad Romanos. (Publication in Mediaeval Studies, The University of Notre Dame), by A. Landgraf 9.1 (1940), 58-59 DOI:10.2307/43626180
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