Books by Charles S. Hartwell:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hartwell, Charles S.: Economy in education. (Educational Review Pub. Co., 1905) (page images at HathiTrust)- Hartwell, Charles S.: The junior high school. Jan. 1916. ([n.p.], 1916) (page images at HathiTrust; US access only)
Find more by Charles S. Hartwell at your library, or elsewhere.