| Clue | Source | Date |
|---|---|---|
| Copies made on onionskin, probably | LA Times Daily | 13 May 2018 |
| Copies made on onionskin, probably | The Washington Post | 13 May 2018 |
| Copies made on onionskin, probably | ||
| Copies before photocopies | Newsday | 02 Sep 2017 |
| Typists' copies, once | ||
| Obsolescent copies | ||
| Typists' copies | ||
| Obsolescent copies | ||
| Paper copies, familiarly | ||
| Office copies | ||
| Copies | ||
| Duplicates. |