| | Recursos y herramientas | (58) |
| | | Música | (7) |
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| | Agatange Collection . (Biblioteca Pública de Toulouse (Francia)) | |
| | Chopin Early Editions . (University of Chicago Library) | |
| | Classical Net | |
| | The E. Azalia Hackley Collection . (Detroit Public Library (Estados Unidos)) | |
| | Internet Resources for Music, Theater and Dance . (Library of Congress. Music Division) | |
| | Invention of Note: Sheet Music Collection . (Massachussets Institute of Technology. Biblioteca Lewis de Música) | |
| | Society for Music Theory . (Society for Music Theory) | |
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