| Urdal, Leif; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | JOHN G. MUNSON | Chief Engineer |
| Urdal, Leif; LCA Annual Report 1928 | LCA Annual Report 1928 | 1928-00-00 | T. W. ROBINSON | Chief Engineer |
| Urdal, Leif; LCA Bulletin 5/22; 1922 | LCA Bulletin 5/22 | 1922-00-00 | W. F. WHITE | Second Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | D. Z. NORTON | Oiler |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | MATHEW ANDREWS | Second Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | MATHEW ANDREWS | Second Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | W. F. WHITE | Second Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | W. F. WHITE | Second Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | CALCITE | First Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | W. F. WHITE | First Assistant |
| Urdal, Leif; LCA Bulletin Oct 1924 | LCA Bulletin Oct 1924 | 1924-00-00 | CARL D. BRADLEY | First Assistant |