CORC
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P642.23 1 Urban and Regional Planning and Development; Air Transportation; Highway Transportation; Railroad Transportation; Waterway Transportation; Meteorology; Water Resources; Waterworks; Agricultural Equipment and Methods; Vegetation and Pest Control; Mathematical Statistics; Materials Science; Social Sciences 1 engineering, environmental 1
environmental sciences 1 industrial economics;probability theory 1 public, environmental & occupational health 1
public, environmental & occupational health, sci 1 water resources 1 地理学::人文地理学::旅游地理 1
水土保持学 1 灾害学 1

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