--note that you can focus your search to collections or repositories
--don't forget to search for both singular and plural forms of nouns
--choose the item type "Archival Materials"
--leave the item type open and add the keyword [archive*]
--archival material descriptions for institutions in the United States. Much of the content comes from WorldCat.
--use Boolean operators to focus your search; example: (archive* OR research collection*) AND cowboy* AND (songs OR ballads OR music)
Check the major articles on your topic for information on research collections and archives.
Remember that Grove and Garland are geographically oriented. For example, if you were researching the folk music of Denmark, locate the Grove article on Denmark (this link will only work from on-campus). Use the table of contents on the left to open the Traditional Music section. Note the heading for "Collections" and "Research."
Die Musik in Geschichte und Gegenwart is not available online, but they do have indexes online. (First translate your keyword(s) to German, then search.)
Go to the Publications search box and enter [associations]. Select Encyclopedia of Associations and use the Quick Search box on the left.
Is there an organization related to your topic? Do they have a website? Do they have a library (aka research collection)?