| Abbreviation for a quote whose source is unknown |
| Previously aired TV shows |
| Formerly, previously |
| Algebraic unknowns |
| Exxon, previously |
| Before, previously |
| Subj. with knowns and unknowns |
| As previously cited |
| Previously, way old |
| Auth. unknown" byline |
| Series of unknown challenges? |
| Unknown author's byline, briefly |
| An unknown quantity |
| Prolific unknown author? |
| Previously unknown |
| Mountain previously named Peak XV |
| Previously, in a 19th century literature class |
| Unknown auth. |
| Previous to, previously |
| Unknown author's byline |
| Called previously |
| Algebra unknowns |
| Taleng agt., previously |
| Author unknown byline, briefly |
| Unknown UFO crash victim? |
| Previously, in poetry |
| Sawyer, previously of "20/20 |
| Previously, to bards |
| Unknowns in algebra |
| ''Auth. unknown'' |