Who's who of American Women and Women of Canada, Volume 5. A.N. Marquis Company. 1968. p. 1143. Consultado el 14 de agosto de 2019. «SPEAR, Mary Eleanor Hunt, graphic analyst; b. Jonesboro, Ind., Mar. 4, 1897; d. Amos Zopher and Mabel Elizabeth (Ewry) Hunt; student (scholarship) Strayer's Bus. Coll., ...»
Tufte, E. R. (June 1990). «Data-Ink Maximization and Graphical Design». Oikos (Nordic Society Oikos) 58 (2): 130-144. doi:10.2307/3545420.
Guitton, Henri (May 1953). «Reviewed Work: Charting Statistics by Mary Eleanor Spear». Revue économique(en francés) (Sciences Po University Press) 4 (3): 443-444. doi:10.2307/3497908.