| Hoffman, Arthur J.; 1909 Red Book; 1909 | 1909 Red Book | 1909-00-00 | W. E. REIS | Chief Engineer |
| Hoffman, Arthur J.; 1910 Red Book; 1910 | 1910 Red Book | 1910-00-00 | WILLIAM H. GRATWICK | Chief Engineer |
| Hoffman, Arthur J.; 1911 Red Book; 1911 | 1911 Red Book | 1911-00-00 | WILLIAM H. GRATWICK | Chief Engineer |
| Hoffman, Arthur J.; 1912 Red Book; 1912 | 1912 Red Book | 1912-00-00 | WILLIAM H. GRATWICK | Chief Engineer |
| Hoffman, Arthur J.; 1913 Red Book; 1913 | 1913 Red Book | 1913-00-00 | ALTON C. DUSTIN | Chief Engineer |
| Hoffman, Arthur J.; 1914 Red Book; 1914 | 1914 Red Book | 1914-00-00 | ALTON C. DUSTIN | Chief Engineer |
| Hoffman, Arthur J.; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | JOSEPH SELLWOOD | Chief Engineer |
| Hoffman, Arthur J.; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | JOSEPH SELLWOOD | Chief Engineer |
| Hoffman, Arthur J.; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | JOSEPH SELLWOOD | Chief Engineer |
| Hoffman, Arthur J.; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | JOSEPH SELLWOOD | Chief Engineer |
| Hoffman, Arthur J.; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1926 Red Book | 1926 Red Book | | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | C. S. ROBINSON | Chief Engineer |
| Hoffman, Arthur J.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | H. H. BROWN | Chief Engineer |
| Hoffman, Arthur J.; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | HARVEY H. BROWN | Chief Engineer |
| Hoffman, Arthur J.; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | YOUNGSTOWN | Chief Engineer |
| Hoffman, Arthur J.; 1941 Red Book; 1941 | 1941 Red Book | 1941-00-00 | YOUNGSTOWN | Chief Engineer |
| Hoffman, Arthur J.; Great Lakes News 11/39; 1939 | Great Lakes News 11/39 | 1939-00-00 | YOUNGSTOWN | Chief Engineer |
| Hoffman, Arthur J.; Great lakes News 7/39; 1939 | Great lakes News 7/39 | 1939-00-00 | C. S. ROBINSON | Chief Engineer |