Books by Harold Worthington Turpin:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Turpin, Harold Worthington, 1893-: The Carbon dioxide of the soil air ... ([Ithaca, N.Y., 1920) (page images at HathiTrust)- Turpin, Harold Worthington, 1893-: The carbon dioxide of the soil and some factors affecting it. ([Ithaca, N. Y.], 1919) (page images at HathiTrust)
Find more by Harold Worthington Turpin at your library, or elsewhere.