| Duff, William S. | | | FRANCIS HOUSE | Second Assistant |
| Duff, William S. | | | | Chief Engineer |
| Duff, William S.; 1930 Blue Book; 1930 | 1930 Blue Book | 1930-00-00 | A. F. HARVEY | Third Assistant |
| Duff, William S.; 1941 Great Lakes Blue Book (?); 1941 | 1941 Great Lakes Blue Book (?) | 1941-00-00 | HOMER D. WILLIAMS | Second Assistant |
| Duff, William S.; 1955 Red Book; 1955 | 1955 Red Book | 1955-00-00 | HENRY H. ROGERS | Chief Engineer |
| Duff, William S.; 1956 Red Book; 1956 | 1956 Red Book | 1956-00-00 | HENRY H. ROGERS | Chief Engineer |
| Duff, William S.; 1957 Red Book; 1957 | 1957 Red Book | 1957-00-00 | J. P. MORGAN JR. | Chief Engineer |
| Duff, William S.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | J. P. MORGAN JR. | Chief Engineer |
| Duff, William S.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | WILLIAM B. DICKSON | Chief Engineer |
| Duff, William S.; 1962 Red Book; 1962 | 1962 Red Book | 1962-00-00 | EUGENE W. PARGNY | Chief Engineer |
| Duff, William S.; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | EUGENE W. PARGNY | Chief Engineer |
| Duff, William S.; 1964 Red Book; 1964 | 1964 Red Book | 1964-00-00 | EUGENE W. PARGNY | Chief Engineer |
| Duff, William S.; 1965 Red Book; 1965 | 1965 Red Book | 1965-00-00 | GOVERNOR MILLER | Chief Engineer |
| Duff, William S.; 1966 Red Book; 1965 | 1966 Red Book | 1965-00-00 | GOVERNOR MILLER | Chief Engineer |
| Duff, William S.; 1967 Red Book; 1967 | 1967 Red Book | 1967-00-00 | A. H. FERBERT | Chief Engineer |
| Duff, William S.; Great Lakes News 6/43; 1943 | Great Lakes News 6/43 | 1943-00-00 | JAMES J. HILL | First Assistant |
| Duff, William S.; Great Lakes News 6/44; 1944 | Great Lakes News 6/44 | 1944-00-00 | EUGENE J. BUFFINGTON | First Assistant |
| Duff, William S.; R. A. Phillips Collection | R. A. Phillips Collection | | ISAAC L. ELLWOOD | Chief Engineer |