Hallen, Cynthia, ed. Emily Dickinson Lexicon. Provo, Utah: Brigham Young University, http://edl.byu.edu/index.php, 2007.
Weissman, Judith. “Transport’s Working Classes: Sanity, Sex, and Solidarity in Dickinson’s Late Poetry.” Midwest Quarterly 29.4 (Summer 1988): 407-24, 408-09.