Online Books by
Thomas Lawrence Hills
(Hills, Thomas Lawrence, 1890-)
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hills, Thomas Lawrence, 1890-: The effect of protozoa on bacterial activity in the soil / (1914) (page images at HathiTrust; US access only)- Hills, Thomas Lawrence, 1890-: Influence of nitrates on nitrogen-assimilating bacteria, (Washington, Govt. print. off., 1918) (page images at HathiTrust)
- Hills, Thomas Lawrence, 1890-: Influence of nitrates on nitrogen-assimilating bacteria / (Washington : Government Printing Office, 1918) (page images at HathiTrust)
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