Blackhawk, Terry. “Science.” An Emily Dickinson Encyclopedia. Ed. Jane Donahue Eberwein. Westport, CT.: Greenwood Press, 1998: 259.
Wolff, Cynthia. Emily Dickinson. Reading, MA: Addison-Wesley Publishing Co., Inc. 1988.
Blackhawk, Terry. “Science.” An Emily Dickinson Encyclopedia. Ed. Jane Donahue Eberwein. Westport, CT.: Greenwood Press, 1998: 259.
Wolff, Cynthia. Emily Dickinson. Reading, MA: Addison-Wesley Publishing Co., Inc. 1988.