Related Clues:

• Abbr. at the bottom of a letter
• Envelope abbr.
• Env. extra
• Letter accompanier: Abbr.
• Abbr. in a business letter
• Env. stuffer
• Multi-vol. set
• Abbr. at the bottom of a business letter
• Direct mail abbr.
• S.A.S.E., e.g.
• Went around
• Env. contents
• Business letter abbr.
• Letter abbr.
• Ref. work