Barnard and Columbia students can access the resources at the nearby library at the Jewish Theological Seminary (JTS) with a $20 per term library card.
JTS is located at 3080 Broadway, on the corner of Broadway and W 122nd street, and their catalog can be searched online
Brandeis University has a helpful research guide on Yiddish resources. Note that database or digital resource links will probably not work. Instead, search the title of the resource in CLIO to get access.