Related Clues:

• Multivolume ref. works
• British refs.
• Library refs.
• Ref. volumes
• Brit. references
• Multi-vol. references
• Ref. tomes
• Huge Brit. ref. works
• British ref. works
• Multivolume refs.
• Refs. that take up lots of shelf space
• Weighty refs.
• British ref. volumes
• They start A-B, C, D-E, etc.
• Sizable refs.