Books by Frederick Alfred Wirt:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Wirt, Frederick Alfred, 1891: A laboratory manual in farm machinery (John Wiley & sons, inc.; [etc., etc.], 1918) (page images at HathiTrust)- Wirt, Frederick Alfred, 1891-: A laboratory manual in farm machinery (John Wiley & sons, inc.; [etc., etc.], 1917) (page images at HathiTrust)
Find more by Frederick Alfred Wirt at your library, or elsewhere.