Related Clues:

• Ref. book
• Ref. work
• Ref. source
• Desk ref. book
• Wordsmith's ref.
• Crossworder's crutch: Abbr.
• The OED, e.g.
• One might be collegiate: Abbr.
• Ref. bk.
• Big ref.
• Lexicographer's bk.
• Vol. on a stand, maybe
• Reference bk.
• Book by Noah Webster (Abbr.)
• Webster's ref