- A. F. Burgess, Alexander Wetmore, Andrew Lincoln Winton, Charles Orrin Townsend, David Griffiths, Edward Owen Guerrant Kelly, Ellery Channing Chilcott, Elmer Ottis Wooton, Eugene Merritt, F. R. Marshall, George Anton Nahstoll, George Bishop Sudworth, George Charles Husmann, James Robert Weir, Mary Engle Pennington, Raphael Zon, Robert Lee Nixon, Samuel Henry Ayers, Silas Cheever Mason, United States. Bureau of Public Roads, Waldo Lee McAtee, George Leslie Bidwell, John Selden Cole, Lewis Lincoln Heller, Minnie Kimball Jenkins, Wallace C. Burnet, William Horace Kerr, William Trimble Johnson, Charles Edward Goodrich, John H. Bornmann, William Wesley Burr, William Alonzo Stocking
· 1916
- Albert Theodore Goldbeck, Arthur Morrison McCreight, Arthur William Sampson, Charles Elisha Bassett, Dwight Isely, Ernest Adna Back, Ernest Dunbar Clark, Francis David Farrell, Frank Hurlbut Chittenden, George Austin Billings, Harry Oscar Sampson, Jacob Hiram Arnold, John William Roberts, Louis S. Murphy, Louise Stanley, Neil E. Stevens, Orator Fuller Cook, Oscar Bernard Jesness, Philip Luginbill, Philip Vincent Cardon, Prévost Hubbard, Victor Nelson Valgren, William Jasper Spillman, Wilson Popenoe, Beyer Aune, Cyril Eugene Pemberton, Frank Herbert Jackson, George G. Ainslie, Leslie MacNaughton, Neale F. Howard, Raymond Boorman Wilcox, William Horace Kerr
· 1920
And conclusions. pp. 7.
- Anne Marie Evans, Arthur Dunham Holmes, Byron Hunter, Charles Dwight Marsh, Charles Orrin Townsend, Cornelius Lott Shear, Curtis Hernon Kyle, D. F. Fisher, Daniel F. Seerey, Edwin Warley James, Eugene Wiley Scott, Fletcher Pearre Veitch, George Henry Baston, Harvey W. Hawthorne, Jacob Hiram Arnold, James Robert Weir, John Oscar Bell, Joseph Arthur Le Clerc, Minnie Kimball Jenkins, Prévost Hubbard, Thomas Henry Jones, Waldo Lee McAtee, Walter David Hunter, William Henry Gibbons, A. B. Clawson, Ernest Everett Hubert, Frank Herbert Jackson, Hannah L. Wessling, Irwin Chace Franklin, Jerome Stanley Rogers, Stephen Oscar Jayne, Vernon Marshall Peirce, Walter Sidney Abbott, Charles Henry Moorefield, Hadleigh Marsh, J. E. Dudley
· 1920
Of results. pp. 2.
No author available
· 1922