| Schumacher, James C.; Cliffs 1975 Seniority list; 1975 | Cliffs 1975 Seniority list | 1975-00-00 | WILLIAM P. SNYDER | ABMM |
| Schumacher, James C.; Cliffs News June 1976 | Cliffs News June 1976 | 1976-00-00 | WILLIAM P. SNYDER JR. | ABMM |
| Schumacher, James C.; Cliffs Seniority list 6/15/81; 1981 | Cliffs Seniority list 6/15/81 | 1981-00-00 | WALTER A. STERLING | ABMM |
| Schumacher, James C.; Cliffs Seniority list 6/26/80; 1980 | Cliffs Seniority list 6/26/80 | 1980-00-00 | WILLIAM P. SNYDER | ABMM |
| Schumacher, James C.; Cliffs Seniority list 7/15; 1915 | Cliffs Seniority list 7/15 | 1915-00-00 | EDWARD B. GREENE | Watchman |
| Schumacher, James C.; Cliffs Seniority list October 1977 | Cliffs Seniority list October 1977 | 1977-00-00 | WILLIAM P. SNYDER JR. | ABMM |
| Schumacher, James C.; Cliffs Seniority List, 7/80; 1980 | Cliffs Seniority List, 7/80 | 1980-00-00 | | |
| Schumacher, James C.; Great Lakes Sailor July, 1964 | Great Lakes Sailor July, 1964 | 1964-00-00 | FINLAND | |
| Schumacher, James C.; pc J. Clark | pc J. Clark | | CADILLAC | Wheelsman |