| Kokko, T. T.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | HOUGHTON | Chief Engineer |
| Kokko, T. T.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | HOUGHTON | Chief Engineer |
| Kokko, T. T.; 1961 Red Book; 1961 | 1961 Red Book | 1961-00-00 | HOUGHTON | Chief Engineer |
| Kokko, T. T.; 1962 Red Book; 1962 | 1962 Red Book | 1962-00-00 | HOUGHTON | Chief Engineer |
| Kokko, T. T.; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | HOUGHTON | Chief Engineer |
| Kokko, T. T.; 1964 Red Book; 1964 | 1964 Red Book | 1964-00-00 | HOUGHTON | Chief Engineer |
| Kokko, T. T.; 1965 Red Book; 1965 | 1965 Red Book | 1965-00-00 | HOUGHTON | Chief Engineer |