Michael G. Becker & Todd K. Bender 
Concordance to the Poems of John Keats [PDF ebook] 

First published in 1981. A Concordance to the Poems of John Keats intended to provide the user with a volume suitable to the varying and increasingly specialised interests of scholarship. This title offers a high degree of inclusiveness that attends to the poems and plays, the emended and authoritative headings, and virtually all of the variant readings considered substantive in the riches of the Keats manuscript materials. This title will be of interest to students of literature.