The Online Books Page

Books by H. B. Humphrey:

Books in the extended shelves:

• Humphrey, H. B.: Coal-mine explosions and coal- and metal-mine fires in the United States during the fiscal year ended June 30, 1945 (U.S. Dept. of the Interior, Bureau of Mines, 1946), also by D. Harrington and W. J. Fene (page images at HathiTrust)
• Humphrey, H. B.: Coal-mine explosions and coal- and metal-mine fires in the United States during the fiscal year ended June 30, 1947 (U.S. Dept. of the Interior, Bureau of Mines, 1948), also by D. Harrington, W. J. Fene, and United States Bureau of Mines (page images at HathiTrust)
• Humphrey, H. B.: Coal-mine explosions and coal- and metal-mine fires in the United States in 1949 (U.S. Dept. of the Interior, Bureau of Mines, 1950), also by John J. V. Forbes and W. J. Fene (page images at HathiTrust)
• Humphrey, H. B.: Coal-mine explosions and coal- and metal-mine fires in the United States in 1950, 1951, and 1952 (U.S. Dept. of the Interior, Bureau of Mines, 1953), also by W. J. Fene (page images at HathiTrust)
• Humphrey, H. B.: Explosions in Pennsylvania coal mines, 1870-1932 (U.S. Dept. of Commerce, Bureau of Mines, 1933), also by John Joseph Vincent Forbes and United States Bureau of Mines (page images at HathiTrust)
• Humphrey, H. B.: Explosions in Tennessee coal mines (U.S. Dept. of Commerce, Bureau of Mines, 1931), also by United States Bureau of Mines (page images at HathiTrust)
• Humphrey, H. B.: Safety with solvents (Bureau of Mines, 1956), also by Genevieve Morgis and United States Bureau of Mines (page images at HathiTrust)

Find more by H. B. Humphrey at your library, or elsewhere.