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Johannes de Muris Proportions. Esquemas proporcionais em Libellus cantus mensurabilis google url musicologie org refurl musicologie org html usg mvAQBClgUDcGXeRLGIhfrDMk sz hl ptBR start tbnid PXRQbizVrzmM tbnh tbnw prev Fq Libellus Bcantus Bmensurabilis asst Dy ndsp hl DptBR sa DN start Johannes de Muris PDold Johannes