Online Books by
Robert H. Schutz
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Schutz, Robert H.: Approved dust respirators for coal mines (Bureau of Mines, 1971), also by United States Bureau of Mines (page images at HathiTrust)- Schutz, Robert H.: Low-temperature performance of compressed-oxygen closed-circuit breathing apparatus (U.S. Dept. of the Interior, Bureau of Mines, 1968), also by E. J. Kloos, A. J. Beckert, and United States Bureau of Mines (page images at HathiTrust)
- Schutz, Robert H.: Respirators approved by the Bureau of Mines as of May 24, 1972 : a revision of Information circular 8436 (U.S. Dept. of the Interior, Bureau of Mines, 1972), also by E. J. Kloos (page images at HathiTrust)
- Schutz, Robert H.: Respiratory protective devices approved by the Bureau of Mines as of October 1, 1965 (U.S. Dept. of the Interior, Bureau of Mines, 1966), also by E. J. Kloos and B. I. Ferber (page images at HathiTrust)
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