US National Championship winners in women's 400-meter hurdles | |
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1969–1979 Amateur Athletic Union |
|
1980–1992 The Athletics Congress |
|
1993–present USA Track & Field |
|
Notes |
|
US National Championship winners in women's 400-meter hurdles | |
---|---|
1969–1979 Amateur Athletic Union |
|
1980–1992 The Athletics Congress |
|
1993–present USA Track & Field |
|
Notes |
|