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Prevalence of ROPS--equipped tractors and farm/farmer characteristics |
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| Authors: | Wilkins J R Engelhardt H L Bean T L Byers M V Crawford J M |
| Institution: | Ohio State University School of Public Health, Division of Epidemiology and Biometrics, 320 West Tenth Avenue, Columbus, Ohio 43210-1240, USA. wilkins.2@osu.edu |
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| 本文献已被 PubMed 等数据库收录！ | |