Final | time | | 1. Nawal El Moutawakel | Marocco | 54.61s | | 2. Judi Brown | United States | 55.20s | | 3. Cristieana Cojocaru | Romania | 55.41s | | 4. Usha P. T. | India | 55.42s | | 5. Ann-Louise Skoglund | Sweden | 55.43s | | 6. Debbie Flintoff | Australia | 56.21s | | 7. Tuija Helander | Finland | 56.55s | | 8. Sandra Farmer | Jamaica | 57.15s | |
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| Venue: Los Angeles Memorial Coliseum 100,000. -- competitors from -- nations. |
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| First 4 from each Semi advanced to Final. |
Semi 1 | time | | 1. Ann-Louise Skoglund | Sweden | 55.17s | | 2. Cristieana Cojocaru | Romania | 55.24s | | 3. Nawal El Moutawakel | Marocco | 55.65s | | 4. Sandra Farmer | Jamaica | 56.05s | | 5. Sharrieffa Barksdale | United States | 56.19s | | 6. Giuseppina Cirulli | Italy | 56.45s | | 7. Susan Morley | Great Britain | 56.67s | | 8. Andrea Page | Canada | 57.89s | |
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Semi 2 | time | | 1. Usha P. T. | India | 55.94s | | 2. Judi Brown | United States | 55.97s | | 3. Debbie Flintoff | Australia | 56.24s | | 4. Tuija Helander | Finland | 56.59s | | 5. Gladys Taylor | Great Britain | 56.72s | | 6. Olga Commandeur | Netherlands | 57.01s | | 7. Ruth Kyalisima | Uganda | 57.02s | NR | 8. Maria Usifo | Nigeria | 58.55s | |
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Heat 1 | time | | 1. Judi Brown | United States | 55.97s | | 2. Usha P. T. | India | 56.81s | | 3. Debbie Flintoff | Australia | 57.20s | | 4. Tuija Helander | Finland | 57.22s | | 5. Lai Lee-chiao | Chinese Taipei | 58.54s | | 6. Alma Vázquez | Mexico | 1:00.86 | |
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Heat 2 | time | | 1. Nawal El Moutawakel | Marocco | 56.49s | | 2. Sharrieffa Barksdale | United States | 56.89s | | 3. Sandra Farmer | Jamaica | 57.06s | | 4. Gladys Taylor | Great Britain | 57.64s | | 5. Lynnette Grime | New Zealand | 58.02s | | 6. Dana Wright | Canada | 58.17s | |
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Heat3 | time | | 1. Olga Commandeur | Netherlands | 56.67s | | 2. Cristieana Cojocaru | Romania | 56.94s | | 3. Ruth Kyalisima | Uganda | 57.38s | | 4. Giuseppina Cirulli | Italy | 57.49s | | 5. Overill Dwyer-Brown | Jamaica | 58.42s | | 6. Angela Wright-Scott | United States | 59.77s | | 7. Agripina de la Cruz | Philippines | 1:02.70 | |
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Heat 4 | time | | 1. Ann-Louise Skoglund | Sweden | 55.75s | | 2. Maria Usifo | Nigeria | 57.78s | | 3. Susan Morley | Great Britain | 58.71s | | 4. Andrea Page | Canada | 59.09s | | 5. Valsamma M. D. | India | 1:00.03 | | 6. Cheryl Blackman | Barbados | 1:01.19 | | 7. Mary Parr | Ireland | 1:01.66 | |
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