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Subjects
- Schools[remove]139
- Child35
- United States22
- Lunch16
- Hygiene13
- Physical Education and Training12
- Adolescent11
- Health Education11
- Humans10
- Sanitation10
- Ventilation7
- Boston6
- Education of Hearing Disabled6
- Students6
- Substance-Related Disorders -- prevention & control6
- Lighting5
- African Americans4
- Curriculum4
- Heating4
- Iowa4