The rural school and hookworm disease /
by Jno. A. Ferrell.
- Washington : G.P.O., 1914.
- 43 p., 8 leaves of plates : ill., map, ports. ; 23 cm.
- Bulletin / U.S. Bureau of Education ; 1914, no. 20. Whole no. 593 .
Copies 1 and 2 with: University extension in the United States / Louis E. Reber. Washington : Govt. Print. Off., 1914. Bound together subsequent to publication.