Books by W. S. Ballard:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Ballard, W. S. (William Salisbury), 1881-: Apple powdery mildew and its control in the Pajaro Valley (U.S. Dept. of Agriculture, 1914), also by W. H. Volck (page images at HathiTrust)- Ballard, W. S. (William Salisbury), 1881-: Internal browning of the yellow Newton apple (U.S. Dept. of Agriculture, 1922), also by J. R. Magness and Lon A. Hawkins (page images at HathiTrust)
Find more by W. S. Ballard at your library, or elsewhere.