| Wilkowski, Leonard L. | | | J. E. UPSON | Captain |
| Wilkowski, Leonard L.; 1949 Blue Book; 1949 | 1949 Blue Book | 1949-00-00 | JAMES MACNAUGHTON | First Mate |
| Wilkowski, Leonard L.; 1953 Red Book; 1953 | 1953 Red Book | 1953-00-00 | A. T. KINNEY | Captain |
| Wilkowski, Leonard L.; 1954 Red Book; 1954 | 1954 Red Book | 1954-00-00 | A. T. KINNEY | Captain |
| Wilkowski, Leonard L.; 1956 Red Book; 1956 | 1956 Red Book | 1956-00-00 | J. E. UPSON | Captain |
| Wilkowski, Leonard L.; 1957 Red Book; 1957 | 1957 Red Book | 1957-00-00 | HORACE S. WILKINSON | Captain |
| Wilkowski, Leonard L.; 1958 Red Book; 1958 | 1958 Red Book | 1958-00-00 | A. T. KINNEY | Captain |
| Wilkowski, Leonard L.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | HORACE S. WILKINSON | Captain |
| Wilkowski, Leonard L.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | FRANK R. DENTON | Captain |
| Wilkowski, Leonard L.; Great Lakes News 11/40; 1940 | Great Lakes News 11/40 | 1940-00-00 | S. H. ROBBINS | First Mate |
| Wilkowski, Leonard L.; Great Lakes News 4/45; 1945 | Great Lakes News 4/45 | 1945-00-00 | ROBERT B. WALLACE | First Mate |
| Wilkowski, Leonard L.; Great Lakes News 7/43; 1943 | Great Lakes News 7/43 | 1943-00-00 | FRANK E. TAPLIN | First Mate |
| Wilkowski, Leonard L.; Great Lakes Review. 1944 | Great Lakes Review. 1944 | 1944-00-00 | ROBERT B. WALLACE | First Mate |