Heat 4 | time | 1. Diane Dixon | USA | 52.45s | 2. Ute Thimm | FRG | 52.79s | 3. Yvonne Van Dorp | HOL | 52.84s | 4. Evecyne Elien | FRA | 52.90s | 5. Marlyn Dewarder | GUY | 54.76s | 6. May Sardouk | LIB | 1:00.01 | -. Sheila Seebaluck | MRI | DNS |
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Heat 5 | time | 1. Valerie Brisco | USA | 51.96s | 2. Maree Holland | AUS | 52.29s | 3. Norfalia Carabali | COL | 53.27s | 4. Kirsten Emmelmann | GDR | 54.02s | 5. Assumpta Achuo-Bei | CMR | 55.22s | 6. Josephine Singarayar | MAL | 56.06s | 7. Lasnet-Lelisse Nkouka | CGO | 57.19s |
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Heat 6 | time | 1. Olga Bryzguina | URS | 51.94s | 2. Linda Keough | GBR | 52.26s | 3. Cathy Rattray-Williams | JAM | 52.39s | 4. Celestine Ndrin | CIV | 52.48s | 5. Mercy Kuttan Math Alapurackal | IND | 53.41s | 6. Ruth Morris | ISV | 55.60s | 7. Barbara Selkridge | ANT | 55.96s |
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