Why is Montreal called Yul?

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Tags

1. #organization
2. #aviation
3. #transport
4. #montr
5. #always
6. #airport
7. #codes
8. #origins
9. #trudeau
10. #organizations
11. #world
12. #association
13. #renamed
14. #manage
15. #january
16. #civil
17. #international
18. #dorval