Books by A. J. Beckert:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Beckert, A. J. (Albert J.): Evaluation of chemical-cartridge respirator face fit (U.S. Dept. of Interior, Bureau of Mines, 1970), also by Harold A. Watson, Patricia M. Gussey, and United States Bureau of Mines (page images at HathiTrust)- Beckert, A. J. (Albert J.): 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, Robert H. Schutz, and United States Bureau of Mines (page images at HathiTrust)
- Beckert, A. J. (Albert J.): Portable methane detectors : effects of gases in mine atmospheres (United States Dept. of the Interior, Bureau of Mines, 1966), also by D. E. Dufresne, R. L. Beatty, H. A. Watson, and United States Bureau of Mines (page images at HathiTrust)
Find more by A. J. Beckert at your library, or elsewhere.