51. Garnet, its mining, milling, and utilization [with bibliography]; by W. M. Myers and C. O. Anderson. Bookmark Corporate/Agency Authors: Mines Bureau Publisher: Mines Bureau Date: 1925 SuDoc number: C 22.3:256
52. Plastic magnesia; by Oliver C. Ralston, Robert D. Pike, and Lionel H. Duschak. Bookmark Corporate/Agency Authors: Mines Bureau and Commerce Department Publisher: Mines Bureau Date: 1925 SuDoc number: C 22.3:236