Congressman Wilson's office used different methods to file correspondence, subject files and project files. Files from 1973-1977 are arranged alphabetically. Files from 1977-1983 have a DIALCOM numbering system (PDF index available upon request). Correspondence from between 1984-1987 has a document number and there is no index to know what each number represents. Files from 1988-1996 return to an alphabetical arrangement.