| Lockhart, Nelson G.; 1906 Red Book; 1906 | 1906 Red Book | 1906-00-00 | COLONIAL | Chief Engineer |
| Lockhart, Nelson G.; 1907 Red Book; 1907 | 1907 Red Book | 1907-00-00 | MECOSTA | Chief Engineer |
| Lockhart, Nelson G.; 1908 Lynn's; 1908 | 1908 Lynn's | 1908-00-00 | MECOSTA | Chief Engineer |
| Lockhart, Nelson G.; 1910 Red Book; 1910 | 1910 Red Book | 1910-00-00 | SATURN | Chief Engineer |
| Lockhart, Nelson G.; 1912 Red Book; 1912 | 1912 Red Book | 1912-00-00 | F. W. HART | Chief Engineer |
| Lockhart, Nelson G.; 1913 Red Book; 1913 | 1913 Red Book | 1913-00-00 | CEPHEUS | Chief Engineer |
| Lockhart, Nelson G.; 1914 Red Book; 1914 | 1914 Red Book | 1914-00-00 | CEPHEUS | Chief Engineer |
| Lockhart, Nelson G.; 1915 Red Book; 1915 | 1915 Red Book | 1915-00-00 | CEPHUS | Chief Engineer |
| Lockhart, Nelson G.; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | ARCTURUS | Chief Engineer |
| Lockhart, Nelson G.; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1926 Red Book | 1926 Red Book | | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | D. O. MILLS | Chief Engineer |
| Lockhart, Nelson G.; Great Lakes News 11/39; 1939 | Great Lakes News 11/39 | 1939-00-00 | VEGA | Chief Engineer |