The Brown-Duvel Moisture Tester and how to Operate it by Roy Ralph Graves, Admer Dickman Miller, Alexander Wetmore, Charles Adolph Weigel, Charles E. Chambliss, Clarence Edward Gibbons, David Augustus Coleman, Edward Albert Chapin, Fred Corry Bishopp, Frederick David Richey, Harold Frederick Loomis, Harold Hall McKinney, Hugh Baxter Killough, Hylton Roller Brown, Murrell Williams Talbot, Norman Eugene McIndoo, Paul Johnson Anderson, Ray Trask Webber, Robert George Hill, Walter Ohlendorf, Walter Sidney Abbott, Lon Adrian Hawkins, W. R. Barger, Charles Wesley Hauck, Emil George Boerner, George S. Demuth, Jesse Oliver Reed, John Mitchell Jenkins, John Valentine Schaffner, Julian Jarnagin Culver, Ludwig Stolz Mayer, Milton Henry Fohrman, Walter Scott Graham, Robert Claude Wright, Will John Morgan