Joe, Sharp tended to publish things in smaller batches. I suppose the most influential set was the 5-vol set of 'Folk Songs in Somerset'. However most of his English manuscript stuff was published by Maud Karpeles in the 2 vol Cecil Sharp's collection of English Folk Songs. I think all of Sharp's manuscripts, English and American, are available online at the EFDSS website. Other than that if you still need a biblio I would suggest Wikipedia. And again Steve Roud has a full biblio for most folk song books ever published in English and this is available with his indexes, both from him direct in various formats and on the EFDSS website.