| Bloecker, Robert Mark; 1909 Red Book; 1909 | 1909 Red Book | 1909-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1911 Red Book; 1911 | 1911 Red Book | 1911-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1912 Red Book; 1912 | 1912 Red Book | 1912-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1913 Red Book; 1913 | 1913 Red Book | 1913-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1914 Red Book; 1914 | 1914 Red Book | 1914-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1915 Red Book; 1915 | 1915 Red Book | 1915-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | GRAND HAVEN | Chief Engineer |
| Bloecker, Robert Mark; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | MILWAUKEE | Chief Engineer |
| Bloecker, Robert Mark; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | MILWAUKEE | Chief Engineer |
| Bloecker, Robert Mark; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | MILWAUKEE | Chief Engineer |
| Bloecker, Robert Mark; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | MILWAUKEE | Chief Engineer |
| Bloecker, Robert Mark; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | MILWAUKEE | Chief Engineer |
| Bloecker, Robert Mark; 1926 Red Book | 1926 Red Book | | MILWAUKEE | Chief Engineer |
| Bloecker, Robert Mark; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | GRAND RAPIDS | Chief Engineer |
| Bloecker, Robert Mark; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | GRAND RAPIDS | Chief Engineer |
| Bloecker, Robert Mark; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | | Fleet Engineer |
| Bloecker, Robert Mark; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | | Fleet Engineer |
| Bloecker, Robert Mark; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1939 Red Book; 1939 | 1939 Red Book | 1939-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1943 Red Book; 1943 | 1943 Red Book | 1943-00-00 | | Superintendent |
| Bloecker, Robert Mark; 1944 Red Book; 1944 | 1944 Red Book | 1944-00-00 | | Superintendent |