From Kristin Doyle Hyland on C19: Spreading the word: a valuable resource for those teaching Emily Dickinson’s poetry (and especially those using the Norton Anthology of Poetry).
Mike Kelly at Amherst has compiled a linked list of their Dickinson manuscipt holdings (online images, freely available!!) for those poems that appear in the Norton Anthology of Poetry, 5th ed. Also includes links to manuscripts available from the Boston Public Library.
PDF version of list available on the above page as well.