Related Clues:
- Business letter abbreviation
- It comes in many vols.
- Brit. reference bk.
- Definitive def. source
- Wordsmith's ref.
- Envelope contents: Abbr.
- Noted Brit lexicon
- UK lexicon
- Env. insertion
- Venerable lexicon: Abbr.
- Massive ref. work
- Major ref. work
- Bus. letter attachment
- Collier's work: Abbr.
- Ltr. accompanier