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...we located 28 of 43 scientists... We successfully contacted 22 of the 28 scientists by phone or e-mail. Three people did not follow up with us, and 12 expressly refused 28-12-3=13 Хотя, может быть, я ошибся в арифметике и опросили только 7: 22-12-3=7. Добавить комментарий: |
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