Bibliography
- 1920 . “ Fourteenth Census of the United States ” . In Bureau of Census: Vol. III , 17 Table 4
- 1871–1872 . Bureau of Education . Reports of Commissioner of Education. Executive Documents, Forty‐Second Congress . 1871–1872 . pp. 1
- 1916 . Adult Illiteracy . Winthrop Talbot , : 7 8
- 1921 . School and Society: , XIV November 19 : 467 468