Books by David Spruill:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Spruill, David: Pork production systems with business analyses : selecting the "right" system (U.S. Dept. of Agriculture, Office of Governmental and Public Affairs, 1981), also by David H. Bache, Clyde R. Weathers, James R. Foster, and United States. Department of Agriculture. Office of Governmental and Public Affairs (page images at HathiTrust)
Find more by David Spruill at your library, or elsewhere.