| Koch, Otto W. | | | SAMUEL MATHER | Third Assistant |
| Koch, Otto W.; 1937 Blue Book; 1937 | 1937 Blue Book | 1937-00-00 | YOUNGSTOWN | Second Assistant |
| Koch, Otto W.; Interlake Log April 1967 | Interlake Log April 1967 | 1967-00-00 | | |
| Koch, Otto W.; Interlake Log April 1967 | Interlake Log April 1967 | 1967-00-00 | | Oiler |
| Koch, Otto W.; Interlake Log April 1967 | Interlake Log April 1967 | 1967-00-00 | | Third Assistant |
| Koch, Otto W.; Interlake Log April 1967 | Interlake Log April 1967 | 1967-00-00 | ROBERT HOBSON | Second Assistant |
| Koch, Otto W.; Interlake Log May 1951 | Interlake Log May 1951 | 1951-00-00 | JOSEPH SELLWOOD | Second Assistant |
| Koch, Otto W.; Interlake Log May 1952 | Interlake Log May 1952 | 1952-00-00 | JAY C. MORSE | Second Assistant |
| Koch, Otto W.; Interlake Log November 1950 | Interlake Log November 1950 | 1950-00-00 | HARRY W. CROFT | Second Assistant |