Related Clues:

• Often-cited ref.
• Library ref.
• Ref. staple
• Brit. lexicon
• Of which A-Ant was pub. in Jan. 1884
• Lib. reference
• Ref. room offering
• It may fill a lib. shelf
• Multivolume ref. work
• Philologist's ref.
• Set of Brit. tomes
• Voluminous ref. set
• Multivolume ref.
• Ref. tome
• Brit. reference work