| Answer | Crossword Clue |
|---|---|
| OED | Venerable ref. set |
| OED | Venerable British ref. set |
| OED | Venerable ref. |
| OED | Venerable ref. work |
| OED | Ref. set |
| ENCYC | Ref. set |
| ENC | Ref. set |
| ENCY | Ref. set |
| OED | Multivolume ref. set |
| OED | Huge ref. set |
| ENC | Ref. book set |
| OED | Major ref. set |
| OED | Voluminous ref. set |
| OED | British ref. set |
| OED | 20-volume ref. set |
