. . . "\u0098An \u009Cintroduction to the logical treatise \"De obligationibus\" Volume I, Introduction : with critical texts of William of Sherwood (?) and Walter Burley / By Romuald Green ; [sous la direction de M. Giele] / [Louvain] : [s.n.] , 1963" . . . . . "0"^^ . "1963"^^ . .