- postcards2,885
- safety film negatives2,835
- oral histories (literary works)2,811
- reports2,655
- editorial cartoons2,616
- financial statements2,391
- audits2,339
- biographies (literary works)2,231
- official reports2,171
- diaries2,057
- aerial photographs1,910
- cadastral maps1,910
- catalogs (documents)1,896
- interviews1,856
- ledgers (account books)1,829
- annual reports1,824
- questionnaires1,778
- field notes1,677
- press releases1,650
- oral histories (literary genre)1,582
