In OneSearch, after limiting to "Library Catalog" and "Music Collection" as the Library Location, You can add specific keywords to find primary sources in the collection, for example:
facsimile -- for reproductions of original handwritten manuscripts or early printed music
correspondence -- the Library of Congress subject for letters of specific people is "correspondence."
interview -- many composers and performers have been interviewed by members of the popular press and by scholars.
Users are encouraged to search for items beyond University Libraries' catalog via RILM Abstracts of Music Literature and WorldCat. Materials not available in print or online may be requested through Interlibrary Loan. Please allow up to seven days for electronic delivery and up to fourteen days for delivery of physical items.