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21 July 2014
- (diff | hist) . . m Fundamentals of Transportation/Vertical Curves; 13:58 . . (0) . . DavidLevinson (Reverted edits by 184.108.40.206 (talk) to last version by DavidLevinson)
- (diff | hist) . . Fundamentals of Transportation/Vertical Curves; 07:26 . . (0) . . 220.127.116.11 (→Crest Vertical Curves)