Vatikan, Biblioteca Apostolica Vaticana, Pal. lat. 1757 Konrad <Spechtshart> Commentum in speculum grammaticae ; Quaestiones in Aristotelem — Reutlingen (I), Südwestdeutschland (Heidelberg ?) (II + III), 1364 (I), um 1380-90 (II + III)
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