| Dennis, Charles R.; LCA Annual 1929 | LCA Annual 1929 | 1929-00-00 | FRED G. HARTWELL | First Assistant |
| Dennis, Charles R.; LCA Annual Report 1930 | LCA Annual Report 1930 | 1930-00-00 | FRED G. HARTWELL | First Assistant |
| Dennis, Charles R.; LCA Annual Report 1934 | LCA Annual Report 1934 | 1934-00-00 | FRED G. HARTWELL | First Assistant |
| Dennis, Charles R.; LCA Annual Report 1935 | LCA Annual Report 1935 | 1935-00-00 | FRED G. HARTWELL | Second Assistant |
| Dennis, Charles R.; LCA Annual Report 1936 | LCA Annual Report 1936 | 1936-00-00 | FRED G. HARTWELL | Second Assistant |
| Dennis, Charles R.; LCA Bulletin 7/37; 1937 | LCA Bulletin 7/37 | 1937-00-00 | FRED G. HARTWELL | assistant engineer |
| Dennis, Charles R.; LCA Bulletin 7/37; 1937 | LCA Bulletin 7/37 | 1937-00-00 | | asst. Fleet Engineer |