Media type: E-Article Title: The mensura of φ in the works of Du Fay Contributor: DeFord, Ruth I. imprint: Oxford University Press (OUP), 2006 Published in: Early Music Language: English DOI: 10.1093/em/cah195 ISSN: 1741-7260; 0306-1078 Keywords: Music Origination: Footnote: