Books by George David Hubbard:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hubbard, George David, 1871-1958: Geology of the Columbus quadrangle. ([Printed by the Springfield publishing company, Springfield, O.], 1911), also by Clinton R. Stauffer and J. A. Bownocker (page images at HathiTrust)
Find more by George David Hubbard at your library, or elsewhere.