| Clue | Source | Date |
|---|---|---|
| Units of distance in physics | New York Times | 13 Sep 2020 |
| Units named for physicist Enrico | New York Times | 05 Oct 2015 |
| Minuscule distance units | New York Times | 23 Jul 2015 |
| Units named for physicist Enrico | ||
| Minuscule distance units | ||
| Units in nuclear physics | ||
| Units of length, in physics | ||
| Physicist Enrico and family |