| Landgraf, William H.; ISMA Directory; 1901 | ISMA Directory | 1901-00-00 | | Captain |
| Landgraf, William H.; ISMA Directory; 1902 | ISMA Directory | 1902-00-00 | | Captain |
| Landgraf, William H.; ISMA Directory; 1903 | ISMA Directory | 1903-00-00 | | Captain |
| Landgraf, William H.; ISMA Directory; 1904 | ISMA Directory | 1904-00-00 | | Captain |
| Landgraf, William H.; ISMA Directory; 1905 | ISMA Directory | 1905-00-00 | | Captain |
| Landgraf, William H.; ISMA Directory; 1906 | ISMA Directory | 1906-00-00 | SATURN | Captain |
| Landgraf, William H.; ISMA Directory; 1907 | ISMA Directory | 1907-00-00 | | Captain |
| Landgraf, William H.; ISMA Directory; 1908 | ISMA Directory | 1908-00-00 | | Captain |