Books by D. D. Wray:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Wray, D. D. (Douglas D.): Implementing an exchange from nitrogen to helium in a large hyperbaric chamber (Groton, Conn. : Naval Medical Research and Development Command, Naval Submarine Medical Research Laboratory, 1977, 1977), also by Kenneth R. Bondi, James E. Jordan, Naval Submarine Medical Research Laboratory, and United States. Naval Medical Research and Development Command (page images at HathiTrust)
Find more by D. D. Wray at your library, or elsewhere.