Books by Fr. R. Trautvetter:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Trautvetter, Fr. R.: Elemente der projectivischen geometrie (J. G. Cotta, 1882), also by Luigi Cremona (page images at HathiTrust)
Find more by Fr. R. Trautvetter at your library, or elsewhere.