| Halvorson, Douglas J. | | | PONTIAC | fireman |
| Halvorson, Douglas J. | | | WILLIAM G. MATHER | Oiler |
| Halvorson, Douglas J.; Cliffs 1967 Seniority List; 1967 | Cliffs 1967 Seniority List | 1967-00-00 | | |
| Halvorson, Douglas J.; Cliffs 1967 Seniority List; 1967 | Cliffs 1967 Seniority List | 1967-00-00 | PONTIAC | Oiler |
| Halvorson, Douglas J.; Cliffs Seniority List 5/28/75; 1975 | Cliffs Seniority List 5/28/75 | 1975-00-00 | PONTIAC | Oiler |
| Halvorson, Douglas J.; Cliffs Seniority list 6/15/81; 1981 | Cliffs Seniority list 6/15/81 | 1981-00-00 | EDWARD B. GREENE | Oiler |
| Halvorson, Douglas J.; Cliffs Seniority list 6/26/80; 1980 | Cliffs Seniority list 6/26/80 | 1980-00-00 | PONTIAC | Oiler |
| Halvorson, Douglas J.; Cliffs Seniority list 7/15; 1915 | Cliffs Seniority list 7/15 | 1915-00-00 | WALTER A. STERLING | Oiler |
| Halvorson, Douglas J.; Cliffs Seniority list October 1977 | Cliffs Seniority list October 1977 | 1977-00-00 | PONTIAC | Oiler |