Selenium Occurrence in Certain Soils in the United States, with a Discussion of Related Topics by C. J. Babcock, D. F. Fisher, Robert Claude Wright, Paul Lewis Harding, Dean Humboldt Rose, Horace Greeley Byers, F. M. Grant, Irvine Theodore Haig, Alfred Paul Dachnowski-Stokes, C. C. Plummer, Charles Roy Adair, George Jacob Hough, H. S. Haller, Hardy Lomax Shirley, Harold M. Harshaw, Jasper E. Pallesen, Kenneth Thurman Williams, Leander D. Howell, Myron Francis Babb, Nelson McKaig, O. N. Eaton, Paul A. Woke, Philip B. Dowden, Preston Richards, Raymond Carl Rietz, Robert Leslie Shotwell, Samuel Ebb Crumb, W. P. Green, Winn Frederick Finner, Paul M. Eide, Boyce D. Ezell, H. H. Laude, Hubert William Lakin, John Robinson Winston, Kenneth Pickett Davis, Lewis Alexander Hurst, M. McPhail, Philip Lindsey Gile, Ronald Lester Mighell, William Virgil Hukill, Alfred Eric Bonn, J. W. Monk, Robert H. Weidman, Zera Calvin Foster