Portions of your assignment ask you to search for critical works about the piece in question- in this case, Coleridge’s “Frost at Midnight”. So we want to find works about Coleridge and his works. Remember to use the catalog and do a subject heading search for Coleridge. Just looking at the titles and subject headings (and in some cases, the tables of contents) of these books will give you an idea of how scholars have studied Coleridge and his works in relation to other artists.
The following reference sources are particularly useful for understanding context:
Critical Survey of Poetry
Guide to British Poetry Explication