Books by S. Colum Gilfillan:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Gilfillan, S. Colum, 1889-1987: Invention and the patent system (U.S. Govt. Print. Off., 1964), also by United States. Congress. Joint Economic Committee (page images at HathiTrust)- Gilfillan, S. Colum, 1889-1987: The social effects of aviation (Houghton Mifflin, 1946), also by William F. Ogburn and Jean Adams (page images at HathiTrust)
Find more by S. Colum Gilfillan at your library, or elsewhere.