| Clark, Spencer; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | LOTUS | Chief Engineer |
| Clark, Spencer; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | LOTUS | Chief Engineer |
| Clark, Spencer; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | LOTUS | Chief Engineer |
| Clark, Spencer; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | LOTUS | Chief Engineer |
| Clark, Spencer; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | LOTUS | Chief Engineer |
| Clark, Spencer; 1926 Red Book | 1926 Red Book | | BURGER | Chief Engineer |
| Clark, Spencer; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | ISLANDER | Chief Engineer |
| Clark, Spencer; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | ISLANDER | Chief Engineer |
| Clark, Spencer; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | ISLANDER | Chief Engineer |
| Clark, Spencer; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | ISLANDER | Chief Engineer |
| Clark, Spencer; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | ELVA | Chief Engineer |
| Clark, Spencer; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | ELVA | Chief Engineer |
| Clark, Spencer; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | ELVA | Chief Engineer |
| Clark, Spencer; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | ELVA | Chief Engineer |