| Abbreviation for a quote whose source is unknown |
| A Beer Is a Beer" author? |
| Prolific poet? |
| Audibly deal with prolific composer (6) |
| Hungarian known for his prolific output of mathematical papers |
| Oft-quoted author? |
| Oft-quoted author? (abbr.) |
| Algebraic unknowns |
| Bugs's favorite author? |
| Subj. with knowns and unknowns |
| Haul in an existential author? |
| Noted ode poet defeats "A Vision" author? |
| Speedy "Guys and Dolls" author? |
| Series of unknown challenges? |
| Promise from a prolific wedding dress designer? |
| John Travolta film reject about "The Lord of the Rings" author? |
| Unknown author's byline, briefly |
| Prolific |
| Prolific income source |
| Auth. unknown" byline |
| Funeral in Berlin" author? |
| Previously unknown |
| Listen attentively to "Walden" author? |
| Unknown author's byline |
| Prolific unknown author? |
| Shy author? |
| Most prolific auth. |
| An unknown quantity |
| Prolific author? |
| I'll catch up after I rest a bit," to an author? |