Books by Herman Gerard Du Buy:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Du Buy, Herman Gerard: A comparative study of sampling devices for air-borne micro-organisms (U. S. Govt. print. off., 1945), also by Mary D. Lackey and Alexander Hollaender (page images at HathiTrust; US access only)
Find more by Herman Gerard Du Buy at your library, or elsewhere.