| Pringle, F. A.; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | IOCOMA | Chief Engineer |
| Pringle, F. A.; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | IOCOMA | Chief Engineer |
| Pringle, F. A.; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | ROYALITE | Chief Engineer |
| Pringle, F. A.; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | ROYALITE | Chief Engineer |
| Pringle, F. A.; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | ROYALITE | Chief Engineer |
| Pringle, F. A.; 1926 Red Book | 1926 Red Book | | ROYALITE | Chief Engineer |
| Pringle, F. A.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | ROYALITE | Chief Engineer |
| Pringle, F. A.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | TALARALITE | Chief Engineer |
| Pringle, F. A.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | ICOLITE | Chief Engineer |
| Pringle, F. A.; 1939 Red Book; 1939 | 1939 Red Book | 1939-00-00 | ICOLITE | Chief Engineer |
| Pringle, F. A.; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | IOCOLITE | Chief Engineer |
| Pringle, F. A.; 1941 Red Book; 1941 | 1941 Red Book | 1941-00-00 | IOCOLITE | Chief Engineer |