Clue: Map abbr. before 1991

Answer: SSR

Length: 3

---

Similar Clues:

• MapQuest abbr. (e.g. AVE with 3 letters)
• Lines on city maps: abbr. (e.g. AVES with 4 letters)
• Abbr. on W.W. II maps (ETO with 3 letters)
• Portable mapping device: Abbr. (GPS with 3 letters)
• Abbr. on old maps (e.g. HRE with 3 letters)
• Heavy lines on maps: Abbr. (HWYS with 4 letters)
• Abbr. on mariners' maps (ISL with 3 letters)
• Lines on maps: Abbr. (e.g. LATS with 4 letters)
• Silver maple leaf wearer: Abbr. (LTCOL with 5 letters)
• It funded Robert Mapplethorpe: Abbr. (NEA with 3 letters)