Related Clues:
- Authoritative ref.
- Brit. ref. work
- Citation-filled ref.
- Ref. book whose first edition took 68 years to complete
- A-to-Zed ref.
- 20-vol. reference
- Brit. dictionary
- Subj. of Simon Winchester's "The Meaning of Everything"
- Twenty-vol. reference work
- Voluminous lexicological work: Abbr.
- Multivolume Brit. reference
- Ref. work with more than 300,000 entries
- Atlas shelfmate: Abbr.
- Pub. with over 300,000 entries
- Exhaustive ref.